Thank is related to Note. Note is related to Do. Do is related to Protect. Protect is related to Police. 
Accident is a synonym of Quality. Popularity is a type of Quality. 
Thank <--RelatedTo--> Note <--RelatedTo--> Do <--RelatedTo--> Protect <--RelatedTo--> Police 
Accident <--Synonym--> Quality <--IsA-- Popularity 