Question: How many prisoners in the us have life sentences?
qaPairs: question: At what frequency do prisoners in the us get life sentences?
answer: 1 in every 2,000
question: As of 2012, how many prisoners in the us have life sentences?
answer: 159,000
question: As of 2012, how many prisoners in the us have life sentences without the chance of parole?
answer: nearly 50,000