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: grass 
 Entity 2: spikelet
yes

Entity 1: pronghorn 
 Entity 2: ear
no

Entity 1: nitrogen fertilizer 
 Entity 2: natural gas

yes