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: earthworm 
 Entity 2: nutrient
no

Entity 1: animal sperm 
 Entity 2: pseudopod
yes

Entity 1: tissue 
 Entity 2: self antigen

yes