user: Question: How many musical guests and songs were in episodes with a production code K0519?
Columns: ['Series #', 'Season #', 'Title', 'Directed by', 'Written by', 'Musical guest and song', 'Original air date', 'Production code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [27.0, 1.0, '"High on the Hog"', 'Frederick K. Keller', 'Larry Moskowitz', 'Al Jarreau "We\'re In This Love Together"', 'August 31, 1995', 'K0503']
SQL:

assistant: SELECT COUNT("Musical guest and song") FROM "Table" WHERE "Production code" = 'K0519';