The conversation between human and AI assistant.
[|Human|] How many people were present in West Berlin when US President JFK delivered his infamous "Ich bin ein Berliner" speech?
[|AI|] Approximately one million people were in attendance on June 26, 1963.
[|Human|] 
How many people were present in West Berlin when US President JFK delivered his infamous "Ich bin ein Berliner" speech?