voluntary association

Deductions

• legal concept is for example voluntary association ⇐ (voluntary association is a legal concept), (is a is inverse of is for example)
• voluntary association is for example American Academy of Arts and Sciences ⇐ (American Academy of Arts and Sciences is a voluntary association), (is a is inverse of is for example)
• voluntary association is subclass of nonprofit organization ⇐ (voluntary association is subclass of non-governmental organization), (non-governmental organization is subclass of nonprofit organization), (is subclass of is a transitive relation)
• American Academy of Arts and Sciences is a voluntary association ⇐ (learned society is subclass of voluntary association), (American Academy of Arts and Sciences is a learned society)