Features used to score candidate answer justifications represented as TAGs.
| Feature . | Description . |
|---|---|
| TAG-level features | |
| numFocusQ | Number of unique Q focus words present in the TAG |
| numFocusA | Number of unique A focus words present in the TAG |
| massFocusQ | Sum of the unique Q focus word weights present in the TAG |
| massFocusA | Sum of the unique A focus word weights present in the TAG |
| numRepeatedFocus | Number of focus words contained in more than one graphlet, with repetition |
| numOtherAnswerF | Negative predictor: the number of focus words from other multiple choice answers included in the current TAG |
| minConcShared | The minimum psycholinguistic concreteness score (i.e., abstractness) of any shared word in the TAG |
| Nugget-level features | |
| numNugF | Number of nuggets that are entirely focus words |
| numNugFS | Number of nuggets that contain only focus words and shared words |
| numNugFSO | Number of nuggets that contain focus, shared, and other unmatched words |
| numNugFO | Number of nuggets that contain only focus words and other words |
| numNugS | Number of nuggets that contain only shared words |
| numNugSO | Number of nuggets that contain only shared words and other words |
| numNugO | Number of nuggets that contain only other words |
| numDefinedFocus | Number of nuggets containing only focus words with outgoing definition edge |
| numDefinedShared | Number of nuggets containing only shared words with outgoing definition edge |
| numQLinksFocus | Number of nuggets containing only focus words that have an incoming labeled link (e.g., definition, instrument, process, temporal) |
| numQLinksShared | Number of nuggets containing only shared words that have an incoming labeled link |
| numNuggetMultiF | Number of nuggets that contain more than one focus word |
| Bridge features | |
| massMaxBridgeScore | Bridge graphlets are graphlets that contain at least one focus word from both the |
| massMinBridgeScore | question and answer, signifying that they are highly relevant to the question and the |
| massDeltaBridgeScore | corresponding answer. A graphlet's bridge score is the sum of this focus word mass. We calculate the minimum, maximum, and delta (max − min) bridge scores across all graphlets within a TAG |
| Feature . | Description . |
|---|---|
| TAG-level features | |
| numFocusQ | Number of unique Q focus words present in the TAG |
| numFocusA | Number of unique A focus words present in the TAG |
| massFocusQ | Sum of the unique Q focus word weights present in the TAG |
| massFocusA | Sum of the unique A focus word weights present in the TAG |
| numRepeatedFocus | Number of focus words contained in more than one graphlet, with repetition |
| numOtherAnswerF | Negative predictor: the number of focus words from other multiple choice answers included in the current TAG |
| minConcShared | The minimum psycholinguistic concreteness score (i.e., abstractness) of any shared word in the TAG |
| Nugget-level features | |
| numNugF | Number of nuggets that are entirely focus words |
| numNugFS | Number of nuggets that contain only focus words and shared words |
| numNugFSO | Number of nuggets that contain focus, shared, and other unmatched words |
| numNugFO | Number of nuggets that contain only focus words and other words |
| numNugS | Number of nuggets that contain only shared words |
| numNugSO | Number of nuggets that contain only shared words and other words |
| numNugO | Number of nuggets that contain only other words |
| numDefinedFocus | Number of nuggets containing only focus words with outgoing definition edge |
| numDefinedShared | Number of nuggets containing only shared words with outgoing definition edge |
| numQLinksFocus | Number of nuggets containing only focus words that have an incoming labeled link (e.g., definition, instrument, process, temporal) |
| numQLinksShared | Number of nuggets containing only shared words that have an incoming labeled link |
| numNuggetMultiF | Number of nuggets that contain more than one focus word |
| Bridge features | |
| massMaxBridgeScore | Bridge graphlets are graphlets that contain at least one focus word from both the |
| massMinBridgeScore | question and answer, signifying that they are highly relevant to the question and the |
| massDeltaBridgeScore | corresponding answer. A graphlet's bridge score is the sum of this focus word mass. We calculate the minimum, maximum, and delta (max − min) bridge scores across all graphlets within a TAG |