Exact(60)
The instruction started and lasted for a 16 weeks period.
Construction began in 20 bc and lasted for 46 years.
A standoff ensued and lasted for about an hour.
The trial began in May, and lasted for a month.
They were all messy and bloody and lasted for years.
Clashes broke out throughout downtown Cairo and lasted for hours.
The emission was impulsive and lasted for about 4 min (11 52 11 56 UT).
They had relatively fast rise times (∼5 min) and lasted for ∼20 min.
The oscillations were of a relaxation type and lasted for more than 48 h.
The Roman Empire once stretched from Scotland to Africa and lasted for more than 400 years.
Initially the course was open to girls age 18-25 and lasted for four months.
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