Experimental is related to Theory. Theory is created by Thinking. Thinking is a synonym of Intelligent. Intelligent is the opposite of Dense. 
Matter is related to Seed. Seed is related to Agent. 
Experimental <--RelatedTo--> Theory --CreatedBy--> Thinking <--Synonym--> Intelligent <--Antonym--> Dense 
Matter <--RelatedTo--> Seed <--RelatedTo--> Agent 