about quesiton for NEC3 Lesson1

Dear all:
我有一个问题请大家指教：
我在学习NEC3第一颗时遇到这样个问题：

  Serveral people complained of 'cat-like noises' at night and a businessman on a
fishing trip saw the puma up a tree.

请问，为什么用T “the puma ” ，business man 怎么确定就是上文所说的那个puma
>?
thanks

版主呢？