Got stuck while doing the "Build a Random Quote Machine" task

I tried to do this:

$.getJSON( "http://api.forismatic.com/api/1.0/method=getQuote&format=json&key=457653&lang=en&jsonp=?",
function(json) { console.log(json); }
);

And I faced an “Uncaught SyntaxError: Unexpected identifier” error.