TASK DEFINITION: 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).
PROBLEM: Entity 1: cigarette 
 Entity 2: hydrogen cyanide

SOLUTION: yes

PROBLEM: Entity 1: fen 
 Entity 2: underground stem

SOLUTION: no

PROBLEM: Entity 1: woodpecker 
 Entity 2: tail

SOLUTION:
yes