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).

Example Input: Entity 1: pewter 
 Entity 2: fluoride
Example Output: no

Example Input: Entity 1: plant food 
 Entity 2: tissue
Example Output: no

Example Input: Entity 1: protozoan 
 Entity 2: shell
Example Output:
yes