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.

[Q]: Sentence1: Maria was very sad. Sentence2: She used Kleenex to dab at her tears. Sentence3: When she'd used the whole box, she got another out of the cabinet. Sentence4: She blew her nose a few times when she was done crying. Sentence5: The Kleenex were all soaked.
[A]: Maria

[Q]: Sentence1: While on a walk the other night I heard an owl. Sentence2: It kept hooting. Sentence3: I tried searching for it all over. Sentence4: I listened and followed the sound. Sentence5: But I never found it.
[A]: I (myself), Owl

[Q]: Sentence1: Greg received a call from a telemarketer. Sentence2: They offered him an opportunity to renew his car's warranty. Sentence3: Greg purchased the policy for three thousand dollars. Sentence4: A few months later Greg's car broke down. Sentence5: His mechanic said the repairs were not covered under the warranty.
[A]:
Telemarketer, His mechanic, Greg