Pioneer is a type of Explore. Explore is a synonym of Research. Scientist can Research. Scientist is a type of Worker. 
Source is related to Electricity. Electricity is a synonym of Current. Current is related to Weather. Weather is related to Ecological. 
Pioneer --IsA--> Explore <--Synonym--> Research <--CapableOf-- Scientist --IsA--> Worker 
Source <--RelatedTo--> Electricity <--Synonym--> Current <--RelatedTo--> Weather <--RelatedTo--> Ecological 