It can take from twenty minutes to more than two hours for them all to leave.
VOA: special.2009.12.07
They all need to be cooked in an oven for several hours.
VOA: special.2010.05.28
It took several hours before security forces were able to gain control of all the sites.
VOA: standard.2009.10.15
"We are going to commit all our day hours today to help clean up so that at least whatever we can save, we can save,"
VOA: standard.2009.10.04
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