He Quotes (page 166)
He scratched his head and frowned. 'Didn't I read in the paper the other day where they'd finally found out what it was?'
'I missed that,' I murmured.
' I saw that, said Sandra. "About two days ago.'
'That's right,' said the bartender.
'What is the secret of life?' I asked.
'I forget,' said Sandra.
'Protein,' the bartender declared. 'They found out something about protein.'
'Yeah,' said Sandra, 'that's it.
Kurt Vonnegut