Extra is related to Salt. Salt can be used for Food. Food is related to Bar. Bar is a synonym of Other. 
you are likely to find Carpet in/at/on Bedroom. Bedroom can be used for Reading. Reading is related to Movement. Movement is related to Crawl. 
Extra <--RelatedTo--> Salt --UsedFor--> Food <--RelatedTo--> Bar <--Synonym--> Other 
Carpet --AtLocation--> Bedroom --UsedFor--> Reading <--RelatedTo--> Movement <--RelatedTo--> Crawl 