TASK DEFINITION: In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
PROBLEM: Emery boards are generally less abrasive than the metal nail files, and hence, emery boards may take longer to file down nails than metal nail files. However, nail files may play a role in disease transmission if they are used on more than one person without adequate sterilization. Emery boards are usually less expensive than metal nail files, therefore emery boards can be economically disposed of after use on a single person. The nail can be smoothed and shaped accurately by taking light, even strokes in one direction across the top of the nail. Twenty to thirty easy strokes can typically shorten excessively long fingernails, while five to ten strokes are sufficient for shaping the nails.

SOLUTION: what is the difference between emery board and nail file

PROBLEM: The canon of theatrically-released Ernest films also includes Ernest Saves Christmas (1988), Ernest Goes to Jail (1990), Ernest Scared Stupid (1991) and Ernest Rides Again (1993). After the financial failure of Ernest Rides Again, all further films were released direct-to-video: Ernest Goes to School (1994), Slam Dunk Ernest (1995), Ernest Goes to Africa (1997) and Ernest in the Army (1998).

SOLUTION: who played ernest in ernest goes to jail

PROBLEM: Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes, and 4 seconds with respect to the stars (see below). Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation. Atomic clocks show that a modern day is longer by about 1.7 milliseconds than a century ago, slowly increasing the rate at which UTC is adjusted by leap seconds. Analysis of historical astronomical records shows a slowing trend of about 2.3 milliseconds per century since the 8th century BCE.

SOLUTION:
how long does it take the earth to make a complete rotation

