In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.

Sentence1: Terena needed an apartment in New York. Sentence2: First she got a broker. Sentence3: Next the broker asked a lot of invasive questions. Sentence4: The broker demanded three years tax returns. Sentence5: Finally, her application was approved!
Terena, Broker

Sentence1: Mark was a big fan of nature. Sentence2: He decided to bring trees to the city. Sentence3: He would take a truck load of trees down each week. Sentence4: He would then plant the trees in parks. Sentence5: Over time the trees grew and now Mark is happy!
Mark

Sentence1: Lisa felt tingling in her hands at feet. Sentence2: And she didn't know what to do. Sentence3: But after walking to work, she noticed that it went away. Sentence4: So she decided to walk everyday. Sentence5: And eventually, the tingling went away.
Lisa