Mark Zuckerberg and three friends started Facebook in two thousand four.

VOA: special.2011.01.14

The igloo was built by 31-year-old Craig Parker, who has fought cancer three times, and four friends.

BBC: York & North Yorkshire

Not only did Driver help behind the counter, he loaded up four carrying cases and he and his three new friends set out to find customers.

NPR: SUPER BOWL WATCH: Beyonce, Avocados, Practice

But if Kokomo came on the radio at night when my friends and I were driving around, three or four wine coolers deep, we'd never turn the dial and might even turn up the volume because we loved to hate it.

NPR: In Brazil, Even Bad Music Is Good