def find_cross(pair, unique_ents):
    """
    Find if the pair is in cross or non-cross sentence.
    Args:
        pair: (tuple) target pair
        unique_ents: (dic) entities based on grounded IDs
    Returns: (str) cross/non-cross
    """
    non_cross = False
    for m1 in unique_ents[pair[0]]:
        for m2 in unique_ents[pair[1]]:
            if m1.sent_no == m2.sent_no:
                non_cross = True
    if non_cross:
        return 'NON-CROSS'
    else:
        return 'CROSS'