you are likely to find Fisherman in/at/on Boat. you are likely to find Net in/at/on Boat. Net is similar to Clear. Clear is related to Description. 
Train is a synonym of Educate. Educate is a synonym of Teach. Ground is a type of Teach. Ground is a type of Connect. 
Fisherman --AtLocation--> Boat <--AtLocation-- Net <--SimilarTo--> Clear <--RelatedTo--> Description 
Train <--Synonym--> Educate <--Synonym--> Teach <--IsA-- Ground --IsA--> Connect 