Bill is related to Measure. Measure is related to Determine. Determine is a synonym of Regulate. 
Explanation is a type of Thinking. Explanation is related to Theory. Theory is a different concept from Practical. Practical is similar to Functional. 
Bill <--RelatedTo--> Measure <--RelatedTo--> Determine <--Synonym--> Regulate 
Thinking <--IsA-- Explanation <--RelatedTo--> Theory <--DistinctFrom--> Practical <--SimilarTo--> Functional 