Disaster is related to Trouble. Trouble is related to Circumstance. Circumstance is a synonym of Consideration. 
Grandmother is a type of Female. Female is related to Girl. Girl is related to Child. 
Disaster <--RelatedTo--> Trouble <--RelatedTo--> Circumstance <--Synonym--> Consideration 
Grandmother --IsA--> Female <--RelatedTo--> Girl <--RelatedTo--> Child 