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: grow embryo 
 Entity 2: gene
yes

Entity 1: ray 
 Entity 2: substance
no

Entity 1: stomach 
 Entity 2: tooth

yes