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: Alfred hated how hot the beach sand was. Sentence2: He found wearing sandals in the sand equally unpleasant. Sentence3: He was determined to invent a solution. Sentence4: Alfred devised a heat-resistant lotion for his feet. Sentence5: He tried to gather capital to bring it to market but failed.

SOLUTION: Alfred

PROBLEM: Sentence1: Thomas went out with his friends on Halloween. Sentence2: They decided to look for ghosts. Sentence3: It was dark and spooky, and Thomas wasn't sure he wanted to go. Sentence4: They did not find a single ghost! Sentence5: Still, he was glad to have spent time with his friends.

SOLUTION: Thomas, Friends

PROBLEM: Sentence1: Reuben worked for a retirement home. Sentence2: His job was to drive residents on group outings to the mall. Sentence3: One day one of the elderly residents got separated from the group. Sentence4: Reuben found her riding her motorized scooter in the parking lot! Sentence5: Reuben got her safely back to the retirement home.

SOLUTION:
Residents, Reuben, One of the residents