var person = {
    firstName: "John",
    lastName: "Doe",
    age: "18",
    country: "Greenland"
};

with(person) {
    console.log("Hi, my name is " + firstName + " " + lastName +
    ". I'm " + age + " years old, and live in " + country + ".");
}
// "Hi, my name is John Doe. I'm 18 years old, and live in Greenland."