Observation is a type of Measurement. Measurement is related to Test. Test is related to Educational. Educational is related to Lecture. 
Glimpse is a type of Indication. Glimpse is related to View. View is related to Line. you are likely to find Line in/at/on Play. 
Observation --IsA--> Measurement <--RelatedTo--> Test <--RelatedTo--> Educational <--RelatedTo--> Lecture 
Indication <--IsA-- Glimpse <--RelatedTo--> View <--RelatedTo--> Line --AtLocation--> Play 