var heroes = [
    {name: “Batman”, franchise: “DC”},
    {name: “Ironman”, franchise: “Marvel”},
    {name: “Thor”, franchise: “Marvel”},
    {name: “Superman”, franchise: “DC”}
];

var marvelHeroes =  heroes.filter(function(hero) {
    return hero.franchise == “Marvel”;
});

// [ {name: “Ironman”, franchise: “Marvel”}, {name: “Thor”, franchise: “Marvel”} ]