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: saccule 
 Entity 2: jaws
no

Entity 1: joint 
 Entity 2: associate muscle
yes

Entity 1: worm 
 Entity 2: tail

yes