Do is related to General. General is related to Pet. Pet is related to Domestic. 
Park is related to Space. Space is related to Alien. Alien is related to Planet. Planet is related to Satellite. 
Do <--RelatedTo--> General <--RelatedTo--> Pet <--RelatedTo--> Domestic 
Park <--RelatedTo--> Space <--RelatedTo--> Alien <--RelatedTo--> Planet <--RelatedTo--> Satellite 