Rose is a type of Pink. Rose is a type of Bush. Bush is etymologically related to Box. 
Lobby can be used for Rest. Illness can be used for Rest. Illness is related to Pill. Pill is related to Birth. 
Pink <--IsA-- Rose --IsA--> Bush --EtymologicallyRelatedTo--> Box 
Lobby --UsedFor--> Rest <--UsedFor-- Illness <--RelatedTo--> Pill <--RelatedTo--> Birth 