Working as data annotators, most of the staff at the Xinlianxin social work services center in Lanzhou, the capital of northwest China's Gansu Province, have physical disabilities. They serve as ...

Elon Musk’s A.I. firm is scaling back on “generalist A.I. tutors.” Allison Robbert/POOL/AFP via Getty Images Data annotation may not be the most glamorous job in Silicon Valley, but it’s indispensable ...