def get_correct_answer_dict(label_segments):
    """
    Function that returns dictionary with the input as keys

    Input: array of tuples; (start index of answer, length of answer)
    Output: dict with string versions of tuples as keys
    """
    label_dict = {}
    for a in label_segments:
        key = str(a[0]) + ' ' + str(a[1])
        label_dict[key] = None
    return label_dict