Table 3.

Number of instances in each dataset of the DDI corpus after the pre-processing phase

DDI types	DDI-DrugBank	DDI-MedLine	Total
Advice	1028	14	1042
Effect	1815	214	2029
Int	272	12	284
Mechanism	1535	83	1618
Other	26 486	1892	28 373
Total	31 136	2215	33 351
Train	25 885	1778	27 663
Test	5251	437	5688

The class Other represents the non-interaction between pairs of drug mentions.