The following are stories and questions about them. Each story is followed by a question and answer to a given question.

Story: If someone asks you, "What do you usually do with your QQ?'' You may say, "I just chat ." Niu Lianzhong teaches PE in a middle school and he sets up a QQ group. However, his purpose is not to chat or show himself. He doesn't want to do anything for fun, either. He just wants more people to know the QQ group. He hopes to help others and now he saves more than 400 people's lives. We all know there are four blood types-A, B, AB, and O. But in fact, a few people's blood types are very special . Niu is just one of them. Since he sets up his QQ group, more than 100 special-blooded people in China join in it. Now, when a patient or a hospital needs some special blood, they just call Niu for help. And Niu contacts his members of the QQ group quickly. Till now, he has donated his blood for about 20 times. Niu hopes that more people will join his group to help others.

Question: how many ;lives had the teacher saved?
Answer:more than 400

Question: what's his group called?
Answer:QQ group

Question: what is his name?
Answer:Niu Lianzhong

Question: what does he do?
Answer:teaches PE in a middle school

Question: what doesn't he do with his qq?
Answer:chat or show himself

Question: how many people in it?
Answer:more than 100

Question: how many bood types?
Answer:four

Question: what are they?
Answer:A, B, AB, and O

Question: what is he?
Answer:a special blood type

Question: do you know what?
Answer:unknown

Question: what country is he in?
Answer:China

Question: how many times has he given?
Answer:about 20 times

Question: how do hospitals get the special syuff
Answer:
they call Niu for help