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: plant 
 Entity 2: suck mouthpart
yes

Entity 1: cucumber 
 Entity 2: gland
no

Entity 1: cave ceiling 
 Entity 2: water

yes