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: acne 
 Entity 2: four toe
no

Entity 1: joint 
 Entity 2: cartilage
yes

Entity 1: ray 
 Entity 2: substance

no