A crowd of people are standing on a snow covered hill watching the sun go down .
a crowd of people on the snow covered hill are watching the sunset .
A crowd of people are standing on a snow covered hill watching the sun go down.
a crowd of people on the snow covered hill are watching the sunset.
The sun only goes down at sunset, so if they're watching it go down you can infer the time.
The sun only goes down at sunset , so if they 're watching it go down you can infer the time .