Text: egyptian authorities on sunday discovered five tunnels used for smuggling petrol and food into the gaza strip , a security official said .

Summary: five gaza smuggling tunnels found in egypt


Text: wimbledon will give players three chances per set to challenge line calls using video technology at this year 's tournament -- one more than the u.s. and australian opens .

Summary: wimbledon to increase player challenges for instant replay


Text: russia 's natural gas giant oao gazprom on tuesday threatened further gas cuts to ukraine within hours unless agreement was reached on a debt dispute and contracts for future deliveries .

Summary: russia threatens further gas cuts to ukraine


Text: the united states on thursday ordered its diplomats in the central african republic -lrb- car -rrb- to leave and indefinitely closed down its embassy in bangui amid a rebellion backed by an exiled army leader .

Summary:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
us orders diplomats to leave central africa shuts down embassy