Blast is a synonym of Explosion. Mine can be used for Explosion. you are likely to find Mine in/at/on Mountain. Mountain is related to Landscape. 
Chief is related to Leader. Leader can be used for Leading. 
Blast <--Synonym--> Explosion <--UsedFor-- Mine --AtLocation--> Mountain <--RelatedTo--> Landscape 
Chief <--RelatedTo--> Leader --UsedFor--> Leading 