0, 90]]],
['A91_96', 'Predicate', [[91, 96]]]

    ],

    relations: [

    ['R0', 'What is to be purchased at each unit price', [['head', 'A112_120'], ['dep', 'A129_139']]],
['R1', 'Which market of a commodity', [['head', 'A12_18'], ['dep', 'A4_11']]],
['R2', 'What is the market of?', [['head', 'A12_18'], ['dep', 'A22_33']]],
['R3', 'Where is there demand?', [['head', 'A36_42'], ['dep', 'A12_18']]],
['R4', 'What is demand?', [['head', 'A36_42'], ['dep', 'A112_120']]],
['R5', 'What is demand?', [['head', '