A jump from the building was made by Superman.
Here's why:
* Subject: The original sentence has Superman as the subject (the one performing the action).
* Object: The object is the jump (the action).
* Passive Voice: In passive voice, the object becomes the subject, and the verb "to be" is used with the past participle of the main verb.
* By Phrase: The original subject becomes part of a "by" phrase.