Stranger can be used for Meeting. you are likely to find Stranger in/at/on Street. Street is related to Real. Real is similar to Documentary. 
Sentiment is a type of Feeling. Feeling is related to Guilt. Guilt is related to Regret. 
Meeting <--UsedFor-- Stranger --AtLocation--> Street <--RelatedTo--> Real <--SimilarTo--> Documentary 
Sentiment --IsA--> Feeling <--RelatedTo--> Guilt <--RelatedTo--> Regret 