Reusing Promise creation

I'm trying to call the getPromise function with different URLs to return different promise, but getting undefined in second promise's then success function.

var http=require('http');
var URL='http://localhost:3000';

var getPromise=function(url){
    var promise=new Promise(function(resolve,reject){
        http.get(url,function(response){
            if(response.statusCode < 200 || response.statusCode > 299){
                reject(new Error('ErrorCode '+response.statusCode))
            }
            var result="";
            response.on('data',function(chunk){result +=chunk;} )
            response.on('end',function(){resolve(result);} )
        })
    });
   return promise;
}



getPromise(URL+'/olympic/2016/ranking/4')
      .then(function(data){
         console.log("Response "+JSON.parse(data).Country);
         getPromise(URL+'/iso/country/'+JSON.parse(data).Country);
      })
      .then(function(data){
        console.log("Data "+data)
      })
      .catch(function(err){
         console.log(err)
      });