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: whole grain 
 Entity 2: ribbed ovary
no

Entity 1: skeleton 
 Entity 2: tube
yes

Entity 1: gland 
 Entity 2: medulla

yes