You will be given a passage, and your task is to generate a Yes/No question that is answerable based on the given passage.

Input: Consider Input: According to the theory of relativity, no information can travel faster than the speed of light in vacuum, but this does not mean that the refractive index cannot be lower than 1. The refractive index measures the phase velocity of light, which does not carry information. The phase velocity is the speed at which the crests of the wave move and can be faster than the speed of light in vacuum, and thereby give a refractive index below 1. This can occur close to resonance frequencies, for absorbing media, in plasmas, and for X-rays. In the X-ray regime the refractive indices are lower than but very close to 1 (exceptions close to some resonance frequencies). As an example, water has a refractive index of 6999999999740000000♠0.99999974 = 1 − 6993260000000000000♠2.6×10 for X-ray radiation at a photon energy of 6985480652946099999♠30 keV (0.04 nm wavelength).

Output: can a refractive index be less than 1?


Input: Consider Input: In December of 2017, the Seven network announced the show has been renewed for a fourth season.

Output: is there going to be a series 4 of 800 words?


Input: Consider Input: Lynyrd Skynyrd is a Southern rock band from Jacksonville, Florida. Formed in 1964, the group originally included vocalist Ronnie Van Zant, guitarists Gary Rossington and Allen Collins, bassist Larry Junstrom and drummer Bob Burns. The current lineup features Rossington, guitarist and vocalist Rickey Medlocke (from 1971 to 1972, and since 1996), lead vocalist Johnny Van Zant (since 1987), drummer Michael Cartellone (since 1999), guitarist Mark Matejka (since 2006), keyboardist Peter Keys (since 2009) and bassist Keith Christopher (since 2017). The band also tours with two backing vocalists, currently Dale Krantz-Rossington (since 1987) and Carol Chase (since 1996).


Output: are there any original members of lynyrd skynyrd still in the band?