TASK DEFINITION: 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.
PROBLEM: Sentence1: Ana needed gas in her car. Sentence2: But the prices in her town were so high! Sentence3: She took a drive out the the reservation. Sentence4: There, gas was almost a dollar cheaper. Sentence5: Ana filled her tank at the reservation!

SOLUTION: Ana

PROBLEM: Sentence1: The sink in my bathroom broke. Sentence2: I decided that I should fix it myself. Sentence3: After one hour, the sink looked worse than before. Sentence4: I finally decided to call a professional plumber. Sentence5: The plumber fixed the sink in ten minutes.

SOLUTION: I (myself), Professional plumber

PROBLEM: Sentence1: Joanne's bedroom was very dark. Sentence2: She bought a lamp to brighten it up. Sentence3: The lamp gave her room a cozy glow. Sentence4: It was a great improvement. Sentence5: Now Joanne could lay in her bed and read comfortably.

SOLUTION:
Joanne