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: commerce 
 Entity 2: bloodstream
yes

Entity 1: seed plant 
 Entity 2: root
yes

Entity 1: breast 
 Entity 2: cyst

yes