Table 1: 

The list of possible edits in decontextualization. The last column represents how frequently the phenomena occurs in the data, from manual analysis on 200 examples, including examples that belongs to infeasible categories and examples that does not require any edits. The bag notation removes x and adds y (⟅-x,+y⟆) at its position.

Edit TypeDescriptionExample%
Pronoun/NP Swap Replacement of a definite pronoun / noun phrase with another referring expression ⟅ -The copper statue, +The Statue of Liberty⟆, a gift from the people of France to the people of the United States, was designed by French sculptor Frédéric Auguste Bartholdi and built by Gustave Eiffel. 40.5 
Name Completion Expansion of acronyms or partial names ⟅ -Meg, +Megan “Meg” Griffin⟆ made her first appearance on television when Family Guy debuted on Fox on January 31, 1999, with the episode “Death Has a Shadow”. 11.5 
DM Removal Removal of discourse markers that can be only understood in context ⟅For instance,⟆ Alaska could be regarded as the highest state because Denali, at 20,310 feet, is the highest point in the US. 3.5 
Bridging Addition of a modifier (typically a PP) to a noun phrase In all fights ⟅+in the Ultimate Fighting Championship⟆, each round can be no longer than five minutes. 13 
Global Scoping Addition of a phrase (typically a PP) that modifies the entire sentence The Japanese film Shoplifters, directed by Hirokazu Kore-eda, won the Palme d’Or ⟅+at the 2018 Cannes Film Festival.⟆ 
Addition Addition of background information that is not necessary but helps readability significantly Charles Darwin⟅+, an English naturalist and biologist,⟆ was among the first to suggest that physiological changes caused by an emotion had a direct impact on , rather than being just the consequence of that emotion. 10 
Edit TypeDescriptionExample%
Pronoun/NP Swap Replacement of a definite pronoun / noun phrase with another referring expression ⟅ -The copper statue, +The Statue of Liberty⟆, a gift from the people of France to the people of the United States, was designed by French sculptor Frédéric Auguste Bartholdi and built by Gustave Eiffel. 40.5 
Name Completion Expansion of acronyms or partial names ⟅ -Meg, +Megan “Meg” Griffin⟆ made her first appearance on television when Family Guy debuted on Fox on January 31, 1999, with the episode “Death Has a Shadow”. 11.5 
DM Removal Removal of discourse markers that can be only understood in context ⟅For instance,⟆ Alaska could be regarded as the highest state because Denali, at 20,310 feet, is the highest point in the US. 3.5 
Bridging Addition of a modifier (typically a PP) to a noun phrase In all fights ⟅+in the Ultimate Fighting Championship⟆, each round can be no longer than five minutes. 13 
Global Scoping Addition of a phrase (typically a PP) that modifies the entire sentence The Japanese film Shoplifters, directed by Hirokazu Kore-eda, won the Palme d’Or ⟅+at the 2018 Cannes Film Festival.⟆ 
Addition Addition of background information that is not necessary but helps readability significantly Charles Darwin⟅+, an English naturalist and biologist,⟆ was among the first to suggest that physiological changes caused by an emotion had a direct impact on , rather than being just the consequence of that emotion. 10 
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