Assign is a type of Choose. Assign is a synonym of Portion. Portion is related to Amount. Amount is related to Total. 
Introduce is related to Meeting. Meeting is related to Lecture. Lecture is a synonym of Talk. Shout is a type of Talk. 
Choose <--IsA-- Assign <--Synonym--> Portion <--RelatedTo--> Amount <--RelatedTo--> Total 
Introduce <--RelatedTo--> Meeting <--RelatedTo--> Lecture <--Synonym--> Talk <--IsA-- Shout 