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).

[EX Q]: Entity 1: gravel 
 Entity 2: tin
[EX A]: yes

[EX Q]: Entity 1: steroid 
 Entity 2: dopamine
[EX A]: no

[EX Q]: Entity 1: reptile 
 Entity 2: seven isotope
[EX A]:
no