Jerry: What do you call a three-mast ship?
Kurt: No idea. A schooner maybe? Or a frigate?
Jerry: Isn't a frigate bigger than a schooner though?
Julius: If I remember correctly, the name doesn't depend on the number of masts but on the type of sails. What do you need it for, a crossword?
Jerry: No, we're on holidays in Cornwall, we've just seen a ship and now we're arguing what type of ship it was ;)
Julius: Oh, okay. Sorry, I can't help you without knowing more details. Better yet, take a pic and send it to me. 
Jerry has seen a three-mast ship on holidays and wonders what that kind of ship is called. Julius and Kurt try to answer his question, but are not sure of the correct name. 