You will be given a definition of a task first, then some input of the task.
In this task, you will be given sentences in which your task is to recognize the name of a person. Note that Twitter names shouldn't be considered as people's names. Although there might be several correct answers, you need to write one of them.

 Sam Judd is asking the right questions on environment & economy : http://t.co/CUS2auaiib
Output:
Sam Judd