var vehicles = [
    {
        brand: 'Peugeot',
        country: 'France'
    },
    {
        brand: 'BMW',
        country: 'Germany'
    },
    {
        brand: 'Audi',
        country: 'Germany'
    }
];

var isMadeInFrance = vehicles
    .some(function(vehicle) {
      return vehicle.country === 'France';
    });

console.log(isMadeInFrance);