Subtle is the opposite of Simple. Simple is related to Rough. Rough is related to Rock. 
Photographer is related to Camera. Camera is related to Tourist. Tourist is related to Nice. Nice is related to Figure. 
Subtle <--Antonym--> Simple <--RelatedTo--> Rough <--RelatedTo--> Rock 
Photographer <--RelatedTo--> Camera <--RelatedTo--> Tourist <--RelatedTo--> Nice <--RelatedTo--> Figure 