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: kangaroo 
 Entity 2: elongate stem
no

Entity 1: paramagnet 
 Entity 2: belly
no

Entity 1: river stingray 
 Entity 2: tail

yes