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: nut 
 Entity 2: iron
yes

Entity 1: firefly 
 Entity 2: tissue
no

Entity 1: engine 
 Entity 2: hydrocarbon

yes