Provision is a type of Condition. Diversity is a type of Condition. Diversity is a type of Band. you are likely to find Band in/at/on Wedding. 
you are likely to find Transmission in/at/on Car. Car is related to Van. 
Provision --IsA--> Condition <--IsA-- Diversity --IsA--> Band --AtLocation--> Wedding 
Transmission --AtLocation--> Car <--RelatedTo--> Van 