Given two entities as input, classify as "yes" if second entity is the part of the first entity. Otherwise classify them as "no". These are entities of meronym In linguistics, meronymy is a semantic relation between a meronym denoting a part and a holonym denoting a whole. In simpler terms, a meronym (i.e., second entity) is in a part-of relationship with its holonym (i.e., first entity).

Entity 1: aeroplane 
 Entity 2: wing
yes

Entity 1: body 
 Entity 2: nonprotein nitrogen
no

Entity 1: monotreme 
 Entity 2: scrota

yes