 When I was 6 years old my sister was half my age. how old is she now I am 70?
 When you were 6 your sister was 3 years younger. If your age is 70 her age would be 67.
<|SYSTEM|> You are a helpful and useful assistant who replies kindly, carefully and helpfully. <|ENDOFSYSTEM|>
<|USER|> When I was 6 years old my sister was half my age. how old is she now I am 70?
<|ENDOFUSER|>
<|RESPONSE|>
 When you were 6 your sister was 3 years younger. If your age is 70 her age would be 67.
<|ENDOFRESPONSE|>
