Child is related to Brother. Brother can be used for Friendship. 
Outline is a synonym of Scheme. Scheme is a synonym of System. System is related to Space. Space is related to Crowd. 
Child <--RelatedTo--> Brother --UsedFor--> Friendship 
Outline <--Synonym--> Scheme <--Synonym--> System <--RelatedTo--> Space <--RelatedTo--> Crowd 