user: Question: Which orchestra has a recording year of 1951?
Columns: ['Piano', 'Conductor', 'Orchestra', 'Record Company', 'Year of Recording', 'Format']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Sergei Rachmaninoff', 'Leopold Stokowski', 'Philadelphia Orchestra', 'RCA Red Seal', 1934.0, 'CD']
SQL:

assistant: SELECT "Orchestra" FROM "Table" WHERE "Year of Recording" = 1951.0;