Partner is a synonym of Wife. Wife is related to Lady. Lady is related to Baby. Baby can Nurse. 
Could is related to Possibility. Possibility is a type of Option. Option is related to Choose. 
Partner <--Synonym--> Wife <--RelatedTo--> Lady <--RelatedTo--> Baby --CapableOf--> Nurse 
Could <--RelatedTo--> Possibility --IsA--> Option <--RelatedTo--> Choose 