Q: 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: Sam's dad gave him newts as pets. Sentence2: The two newts had their own tank. Sentence3: They were tiny, but Sam fed them crickets. Sentence4: He cleaned their tank often to keep them healthy. Sentence5: Soon the newts were as big as his hand!
A:
Newts, Sam's dad, Sam