Problem: The Combat Box was a tactical formation used by heavy (strategic) bombers of the U.S. Army Air Forces during World War II. The combat box was also referred to as a "staggered formation". Its defensive purpose was in massing the firepower of the bombers' guns, while offensively it concentrated the release of bombs on a target.

Based on the paragraph above can we conclude that "The Combat Box took months to develop."? OPTIONS:
- Yes
- It's impossible to say
- No

A: It's impossible to say

Problem: Foals are an English indie rock band from Oxford, England formed in 2005, consisting of lead vocalist and lead guitarist Yannis Philippakis, drummer and percussionist Jack Bevan, rhythm guitarist Jimmy Smith, bassist Walter Gervers, and keyboardist Edwin Congreave. Since the band's formation, their line-up has remained constant, except for the departure of former lead singer Andrew Mears.

Based on the paragraph above can we conclude that "My hair is blonde."? OPTIONS:
- Yes
- It's impossible to say
- No

A: It's impossible to say

Problem: Ogallala is a city in Keith County, Nebraska, United States. The population was 4,737 at the 2010 census. It is the county seat of Keith County. In the days of the Nebraska Territory, the city was a stop on the Pony Express and later along the transcontinental railroad. The Ogallala Aquifer was named after the city.

Based on the paragraph above can we conclude that "Ogallala is a city in Nebraska was once a stop for the Pony Express."? OPTIONS:
- Yes
- It's impossible to say
- No

A:
Yes