Lap is part of Skirt. Lap is related to Person. Person is related to Being. Being is related to Exist. 
you are likely to find Voice in/at/on Person. Voice is related to Human. Human is related to Type. 
Skirt <--PartOf-- Lap <--RelatedTo--> Person <--RelatedTo--> Being <--RelatedTo--> Exist 
Person <--AtLocation-- Voice <--RelatedTo--> Human <--RelatedTo--> Type 