xt: "Both involved Boeing 777 aircraft .",

    entities: [

    ['A5_13', 'Predicate', [[5, 13]]],
['A25_33', 'Predicate', [[25, 33]]],
['A21_24', 'Predicate', [[21, 24]]],
['A14_20', 'Predicate', [[14, 20]]]

    ],

    relations: [

    ['R0', 'Who was the maker of the aircraft?', [['head', 'A25_33'], ['dep', 'A14_20']]],
['R1', 'What is the 777', [['head', 'A21_24'], ['dep', 'A25_33']]],
['R2', 'What model was the Boeing?', [['head', 'A14_20'], ['dep', 'A21_24']]]

    ]
    };

    


     head.ready(