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: propeller 
 Entity 2: base pair
no

Entity 1: fen 
 Entity 2: underground stem
no

Entity 1: air 
 Entity 2: concentration

yes