What the assertions means to humans:
 
 
- Lena Horne performs Stormy Weather.
- Lena Horne is a performer.
- The music she performs is Stormy Weather.
- The performance is in the context of the soundtrack of the movie "Stormy Weather".
- The assertion that Lena Horne performs Stormy Weather, is a valid instance of a performance assertion.
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- The performer is a musician.
- The music is a song.
- Lena Horne is a musician.
- Stormy Weather is a song.