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: joint 
 Entity 2: four incisor tooth
no

Entity 1: photosystem 
 Entity 2: carotenoid
yes

Entity 1: hardwood tree 
 Entity 2: cover

yes