src/transformers/data/processors/glue.py/QqpProcessor/_create_examples
class QqpProcessor:    def _create_examples(self, lines, set_type):
        """Creates examples for the training, dev and test sets."""
        test_mode = set_type == "test"
        q1_index = 1 if test_mode else 3
        q2_index = 2 if test_mode else 4
        examples = []
        for (i, line) in enumerate(lines):
            if i == 0:
                continue
            guid = f"{set_type}-{line[0]}"
            try:
                text_a = line[q1_index]
                text_b = line[q2_index]
                label = None if test_mode else line[5]
            except IndexError:
                continue
            examples.append(InputExample(guid=guid, text_a=text_a, text_b=text_b, label=label))
        return examples