Picked up this hand last night. Partner's profile says advanced. No agreements on system so SAYC assumed. Also, if you choose one of the options that could potentially mean a few things, please say what you would take it as.
For anyone who bids 4NT, you get a 5D response showing 1 ace, do you go ahead and bid the slam hoping it's not the ♥A?

Help

1S-(2H)-4S-(P)
??