narrative: Robert decided to go on a cruise. He bought his tickets online. He booked in advance to get a better deal. Robert bought his ticket for half the price because he booked early. Robert was glad that he booked in advance.
question: Why was Robert glad that he booked in advance?
original_sentence_for_question: Robert was glad that he booked in advance.
answer: he got his ticket for half price.
original_narrative_form: Robert decided to go on a cruise. He bought his tickets online. He booked in advance to get a better deal. Robert bought his ticket for half the price because he booked early. Robert was glad that he booked in advance.
question_meta: rocstories_narrative_39283_sentence_4_question_1