The ROS Wiki is for ROS 1. Are you using ROS 2 (Humble, Iron, or Rolling)? Check out the ROS 2 Project DocumentationPackage specific documentation can be found on index.ros.org
The people_experimental stack has mostly been merged into the people stack.
Ethan Dreyfuss discussing people following:
Wiki: people_experimental (last edited 2014-08-03 00:33:34 by DavidLu)