Nick Holmes, who works on the Stealth team, says there is a pattern of people in particular areas of the city being attacked by gunmen from rival areas as part of feuds going back ten years or more.

ECONOMIST: Guns in Nottingham

Most railways and roads were built in a radial pattern, with Mexico City as the spider in the centre of the web.

ECONOMIST: All roads lead to Mexico City

Then analysts began looking at several previously unexamined sources of data about fires across the city, and a pattern emerged.

WHITEHOUSE: Efficiency through Strategic Data Analysis

The game followed a similar pattern after the break, with City fashioning the better chances and Aalborg committing plenty of men forward in the hope of snatching an away goal.

BBC: Man City 2-0 Aalborg

"They want to know the usage pattern -- how many calls are going from Quezon City to, say, Makati -- of a brand-new group of customers, " says Duffy.

CNN: BUSY SIGNALS