xcode10 button to create mad lips story will not run, i am new to Xcode : i am just starting out with Xcode 10 and cannot get this button to work for my mad libs creation. this is just for fun but i would love to know how to fix it. please look over my code to see why the "create story" button is not active thank you so much 

    //
    //  ViewController.swift
    //  Field Button Fun
    //
    //  Created by Audrey Chao on 8/3/16.
    //  Copyright © 2016 Maddie Chao. All rights reserved.
    //

    import UIKit

    class ViewController: UIViewController {
    
        @IBOutlet weak var thePlace: UITextField!
        @IBOutlet weak var theVerb: UITextField!
        @IBOutlet weak var theNumber: UITextField!
        @IBOutlet weak var theTemplate: UITextView!
        @IBOutlet weak var theStory: UITextView!
    
    
        @IBAction func createStory(sender: AnyObject) {
            theStory.text = theTemplate.text
            theStory.text = theStory.text.stringByReplacingOccurrencesOfString("<place>", withString: thePlace.text!)
            theStory.text =   theStory.text.stringByReplacingOccurrencesOfString("<verb>", withString:   theVerb.text!)
     theStory.text =         theStory.text.stringByReplacingOccurrencesOfString("<number>", withString:         theNumber.text!)
        
        }

        override func viewDidLoad() {
            super.viewDidLoad()
            //thePlace.resignFirstResponder()
            // Do any additional setup after loading the view, typically from a       nib.
        }

        override func didReceiveMemoryWarning() {
            super.didReceiveMemoryWarning()
            // Dispose of any resources that can be recreated.
        }


    }
