Negative is related to Bad. Bad is related to Pollution. Pollution is related to Environmental. Environmental is related to Weather. 
Base is a type of Number. Number is related to Term. Term is a type of Point. 
Negative <--RelatedTo--> Bad <--RelatedTo--> Pollution <--RelatedTo--> Environmental <--RelatedTo--> Weather 
Base --IsA--> Number <--RelatedTo--> Term --IsA--> Point 