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Table 1 

Proportion of dependency trees classified by projectivity, planarity, k-planarity, and ill-nestedness in a sample of treebanks.

Language
Trees
Non-Projective
Not Planar
Not 2-Pl.
Not 3-Pl.
Not 4-Pl.
Ill-nested
Arabic 2,995 205 (6.84%) 158 (5.28%) 0 (0.00%) 0 (0.00%) 0 (0.00%) 1 (0.03%) 
Czech 87,889 20,353 (23.16%) 16,660 (18.96%) 82 (0.09%) 0 (0.00%) 0 (0.00%) 96 (0.11%) 
Danish 5,512 853 (15.48%) 827 (15.00%) 1 (0.02%) 1 (0.02%) 0 (0.00%) 6 (0.11%) 
Dutch 13,349 4,865 (36.44%) 4,115 (30.83%) 162 (1.21%) 1 (0.01%) 0 (0.00%) 15 (0.11%) 
German 39,573 10,927 (27.61%) 10,908 (27.56%) 671 (1.70%) 0 (0.00%) 0 (0.00%) 419 (1.06%) 
Portuguese 9,071 1,718 (18.94%) 1,713 (18.88%) 8 (0.09%) 0 (0.00%) 0 (0.00%) 7 (0.08%) 
Swedish 6,159 293 (4.76%) 280 (4.55%) 5 (0.08%) 0 (0.00%) 0 (0.00%) 14 (0.23%) 
Turkish 5,510 657 (11.92%) 657 (11.92%) 10 (0.18%) 0 (0.00%) 0 (0.00%) 20 (0.36%) 
Language
Trees
Non-Projective
Not Planar
Not 2-Pl.
Not 3-Pl.
Not 4-Pl.
Ill-nested
Arabic 2,995 205 (6.84%) 158 (5.28%) 0 (0.00%) 0 (0.00%) 0 (0.00%) 1 (0.03%) 
Czech 87,889 20,353 (23.16%) 16,660 (18.96%) 82 (0.09%) 0 (0.00%) 0 (0.00%) 96 (0.11%) 
Danish 5,512 853 (15.48%) 827 (15.00%) 1 (0.02%) 1 (0.02%) 0 (0.00%) 6 (0.11%) 
Dutch 13,349 4,865 (36.44%) 4,115 (30.83%) 162 (1.21%) 1 (0.01%) 0 (0.00%) 15 (0.11%) 
German 39,573 10,927 (27.61%) 10,908 (27.56%) 671 (1.70%) 0 (0.00%) 0 (0.00%) 419 (1.06%) 
Portuguese 9,071 1,718 (18.94%) 1,713 (18.88%) 8 (0.09%) 0 (0.00%) 0 (0.00%) 7 (0.08%) 
Swedish 6,159 293 (4.76%) 280 (4.55%) 5 (0.08%) 0 (0.00%) 0 (0.00%) 14 (0.23%) 
Turkish 5,510 657 (11.92%) 657 (11.92%) 10 (0.18%) 0 (0.00%) 0 (0.00%) 20 (0.36%) 
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