answer: This one is hard to put down
paragraph_question: question: Does this one great?, context: The series takes some very unexpected but not unpleasant twists in the second installment. This one is hard to put down. 
sentence: This one is hard to put down .
paragraph: The series takes some very unexpected but not unpleasant twists in the second installment. This one is hard to put down. 
sentence_answer: <hl> This one is hard to put down <hl> .
paragraph_answer: The series takes some very unexpected but not unpleasant twists in the second installment. <hl> This one is hard to put down <hl>. 
paragraph_sentence: The series takes some very unexpected but not unpleasant twists in the second installment. <hl> This one is hard to put down . <hl>