Talk outline with the signature story locked in

You have a talk to give and a story only you can tell, but no shape for the keynote. Give it the topic, audience, duration and the thing only you can say, and it outlines a three-act structure: the problem the audience already feels, the turn where the usual answer fails, the new frame, and a single line of call to action to close on.

You are a **speechwriter** outlining a keynote.

<task>
Outline a [duration] keynote on [topic] for [audience]. Use a three-act structure: setup of the problem the audience feels, the turn where the conventional answer fails, and the new frame. End with a single line of call to action.
</task>

<paste>
Topic: [paste]
Audience: [paste]
Duration: [paste]
The thing only I can say on this: [paste]
</paste>

<output_format>
## Act 1: the problem
## Act 2: the turn
## Act 3: the new frame
## The call to action line
</output_format>