Identify is related to Flag. Flag is related to Flying. Flying is related to Missile. Missile is related to Space. 
Native is related to Single. Echo is a type of Single. Echo is a synonym of Repeat. 
Identify <--RelatedTo--> Flag <--RelatedTo--> Flying <--RelatedTo--> Missile <--RelatedTo--> Space 
Native <--RelatedTo--> Single <--IsA-- Echo <--Synonym--> Repeat 