TASK DEFINITION: This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning). 
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.
PROBLEM: Passage: The Colts traveled to Denver, Colorado for an AFC conference matchup with the Denver Broncos. The game started with punts by both teams on their own opening drives. The Colts then drove down the field and scored on a 38-yard field goal by Adam Vinateri. After a defensive interception set the Colts up down field, Indianapolis was forced to kick another field goal to extend their lead to 6-0 at the end of the first quarter. The Colts offense did not stop firing with the start of the second quarter, Peyton Manning threw to Austin Collie for his first touchdown of the game and gave the Colts a 13-0 lead. With the start of the second quarter the Bronco offense came alive. However, many offensive mistakes and key plays caused Denver to get points only on a late field goal by Matt Prater. At halftime, the Indianapolis Colts held the lead of 13-3. Denver received the ball first in the second half and was able to capitalize with a touchdown drive closing the game to a three-point margin. After switching possession, the Colts were able to respond with a touchdown drive that included Blair White, who was just signed from the practice squad prior to the game. Denver then scored a field goal late in the third quarter making the game a 20-13 contest heading into the fourth quarter. After defensive stops, the Colts were able to score a touchdown on another Austin Collie reception to take a commanding 27-13. The defense was able to stop the Broncos on their next possession allowing the Colts to win 27-13, and take their second straight game of the season, improving their record to 2-1.

SOLUTION: How many field goals were kicked in the first half?

PROBLEM: Passage: Charles Woodson said days prior to Week 5 that he always wanted to intercept a pass from Peyton Manning as he had not accomplished this feat in his entire 18-year career. He lived up to his word, intercepting Manning twice, but it was Carr's interception and the resulting return for a touchdown by Chris Harris that was the difference in the game. The Raiders fell to the Broncos 16-10 as the team dropped to 2-3 going into their bye week.

SOLUTION: How many more points did the Broncos score than the Raiders?

PROBLEM: Passage: From a 1988 study in China, the US protection agency quantified the lifetime exposure of arsenic in drinking water at concentrations of 0.0017 mg/L (1.7 ppb), 0.00017 mg/L, and 0.000017 mg/L are associated with a lifetime skin cancer risk of 1 in 10,000, 1 in 100,000, and 1 in 1,000,000 respectively. WHO asserts that a water level of 0.01 mg/L (10 ppb) poses a risk of 6 in 10000 chance of lifetime skin cancer risk and contends that this level of risk is acceptable.

SOLUTION:
According to the passage, which substance may pose a risk of skin cancer?