answer: This unit seems well built and is easy to setup but the sound quality is terrible
paragraph_question: question: How is the quality?, context: I bought this unit to replace a similar device that stopped working.  This unit seems well built and is easy to setup but the sound quality is terrible.  Going to return and try a different one. 
sentence:  This unit seems well built and is easy to setup but the sound quality is terrible .
paragraph: I bought this unit to replace a similar device that stopped working.  This unit seems well built and is easy to setup but the sound quality is terrible.  Going to return and try a different one. 
sentence_answer:  <hl> This unit seems well built and is easy to setup but the sound quality is terrible <hl> .
paragraph_answer: I bought this unit to replace a similar device that stopped working. <hl> This unit seems well built and is easy to setup but the sound quality is terrible <hl>. Going to return and try a different one. 
paragraph_sentence: I bought this unit to replace a similar device that stopped working. <hl> This unit seems well built and is easy to setup but the sound quality is terrible . <hl> Going to return and try a different one.