Practice is a type of Implementation. Sing requires Practice. Sing is related to Vocal. Vocal is related to Sound. 
Statue is related to Important. Friendship can be Important. Friendship is created by Trust. Trust is a synonym of Rely. 
Implementation <--IsA-- Practice <--HasPrerequisite-- Sing <--RelatedTo--> Vocal <--RelatedTo--> Sound 
Statue <--RelatedTo--> Important <--HasProperty-- Friendship --CreatedBy--> Trust <--Synonym--> Rely 