Drum is related to Musical. Musical is related to Sing. one thing you do when you Happy is Sing. 
Pro is related to Produce. Produce is related to Create. Create is related to Writing. Criticism is a type of Writing. 
Drum <--RelatedTo--> Musical <--RelatedTo--> Sing <--HasSubevent-- Happy 
Pro <--RelatedTo--> Produce <--RelatedTo--> Create <--RelatedTo--> Writing <--IsA-- Criticism 