Matter is related to Dark. Dark is related to Sky. Sky is related to Straight. Straighten is derived from Straight. 
Following is related to Track. you are likely to find Track in/at/on Station. Station is related to Fill. 
Matter <--RelatedTo--> Dark <--RelatedTo--> Sky <--RelatedTo--> Straight <--DerivedFrom-- Straighten 
Following <--RelatedTo--> Track --AtLocation--> Station <--RelatedTo--> Fill 