What is wrong with my Java code?

I'm doing this thing that is teaching me how to use JavaScript. It says that they're is a error on line 19 saying "Expected an identifier and instead saw 'else'. missing ';' before statement"

Here is my script:

// Check if the user is ready to play!

confirm("Ready");

var age = 13;

age = prompt("What's your age");

if(age > 13)

{

console.log("You're allowed to play, but I take no responsibility.");

}

else

{

console.log("Play on!");

}

console.log("You are at a Justin Bieber concert, and you hear this lyric 'Lace my shoes off, start racing.'");

console.log("Suddenly, Bieber stops and says, 'Who wants to race me?'");

var userAnswer;

userAnswer = prompt("Do you want to race Bieber on stage?");

if(userAnswer === "yes","Yes"); {

console.log("You and Bieber start racing. It's neck and neck! You win by a shoelace!");

} else {

console.log("Oh no! Bieber shakes his head and sings 'I set a pace, so I can race without pacing.'");

}