to explain s.th. to s.o. | to demonstrate (as true), i.e., prove s.th.
to subscribe to, agree with s.th. (object: content)...
to sing (in praise) (object: none) | to...
to explain s.th. to s.o. | to demonstrate (as true), i.e., prove s.th.
to sing, make music (object: none) | to...
to have authority to do s.th. (object: act,...