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Table 9: 
Ranking parsers: STOG (Zhang et al.); GPLA (Lyu and Titov); TOP-DOWN (Cai and Lam, 2019). The structure error is defined as 11371Σi=11371|f(goldi)f(predi)|, where f either is node degree or graph density. All four metrics differ significantly in their scores (paired t-test, p<0.05).
metric scoresstructure error
SmSBAGSBGAS2mnode degreegraph density
STOG 76.3|1 59.6|1 58.9|1 77.9|1 0.08 0.0069 
GPLA 74.5|2 54.2|3 52.9|3 76.2|2 0.08 0.0068 
TOP-DOWN 73.2|3 54.5|2 53.1|2 75.0|3 0.11 0.0078 
metric scoresstructure error
SmSBAGSBGAS2mnode degreegraph density
STOG 76.3|1 59.6|1 58.9|1 77.9|1 0.08 0.0069 
GPLA 74.5|2 54.2|3 52.9|3 76.2|2 0.08 0.0068 
TOP-DOWN 73.2|3 54.5|2 53.1|2 75.0|3 0.11 0.0078 
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