Long is related to Great. Great is related to Amazing. 
Intelligent is a synonym of Thinking. Thinking is related to Consider. Consider is a synonym of Observe. Observe is related to Examine. 
Long <--RelatedTo--> Great <--RelatedTo--> Amazing 
Intelligent <--Synonym--> Thinking <--RelatedTo--> Consider <--Synonym--> Observe <--RelatedTo--> Examine 