<|im_start|>user
How many colours does a rainbow have?<|im_end|>
<|im_start|>assistant
A rainbow typically comprises 7 colors - red, orange, yellow, green, blue, indigo and violet, which can be remembered using acronyms like "ROY G BIV" or simple sentences like "Richard Of York Gave Battle In Vain", where the starting letter of each word corresponds to the starting letter of the colors of the rainbow, in order.<|im_end|>
