https://www.quia.com/pop/35933.html
https://www.quia.com/quiz/733552.html
https://www.quia.com/pop/37752.html
http://www.softschools.com/quizzes/grammar/recognizing_sentence_or_fragments/quiz2130.html
https://www.quia.com/cb/120058.html
https://www.quia.com/quiz/366943.html