Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Input: Consider Input: D0g is a fictional character in the Half-Life series of video games, first introduced in Half-Life 2 in 2004.

Output: What fictional work does D0g exist in?


Input: Consider Input: Modeled after US hot website.com, group buying websites are now popular in China. These websites use the power of group buying to get competitive discounts for a daily deal on some best stuff to do, see, eat and buy in the cities across China. Discounts are available within just one click. Zhao lei, a software engineer in Beijing, loves the one-hour lunch break at noon,as it is the best time for him to check "today's special" at his favorite group buying websites . Sometimes he searches for great deals at directory sites devoted to the new shopping space. Zhao spends around 800 yuan($117.65) on group buying every month, mostly to buy food coupons for eating at some nice restaurants and occasionally to find something fun to do. " I love group buying. In addition to the competitive discounts it offers, it helps me get something fun, exciting and new, and such surprises give me a reason to try something new," he said. When he finds a really good bargain, he will send the link to friends or colleagues through MSN,QQ, or e-mail, or share the information at some social networking websites. In doing so, he often gets a certain cut off the price. At some sites, buyers are invited to leave notes about what they want to buy and the website will consider it if similar applications reach a certain number. That is how Zuo got her digital camera after waiting for two months. "It is cool. I want to buy a new digitgal camera for my trip to Switzerland this winter, but I never expected such cheap prices!" Zuo said.

Output: What is the passage mainly about?


Input: Consider Input: Le Bassin Aux Nympheas (Water Lily Pond; 1919) is one of the series of Water Lilies paintings by French impressionist artist Claude Monet.


Output: What year was Le Bassin Aux Nymphéas created in?