What was the first movie to feature the line "We could have made beautiful music together"?

The General Died at Dawn (1936) was the first movie to feature the line “We could have made beautiful music together”.

Gary Cooper says it to Madeleine Carroll.

What movie was advertised with the line, "To avoid fainting, keep repeating: "It's only a movie, It's only a movie"? The Last House on the Left (1972), was advertised with the line, "To avoid fainting, keep repeating: "It's only a movie, It's only a movie".
What was the first cartoon shown in U.S. movie theaters with a regular feature? In 1909, Gertie the Dinosaur, created by New York Journal cartoonist Winsor McKay, became the first cartoon shown in movie houses along with a regular feature.
What was the first Fu Manchu movie made as a sound feature? The Mysterious Dr. Fu Manchu (1929), starring Warner Oland, was the first Fu Manchu movie made as a sound feature.
What was cult movie director Paul Bartel's first full-length feature? Private Parts (1972), a black comedy about a hotel full of sex perverts, was cult movie director Paul Bartel's first full-length feature. It featured Stanley Livingston, who…
What movie first featured the line, "Do you mind if I slip into something more comfortable?" Jean Harlow said "Do you mind if I slip into something more comfortable?" in Hell's Angels (1930).
In what movie does the line "The natives are restless tonight" first appear? The Island of Lost Souls (1933) was the first movie with the line "The natives are restless tonight". It is said by Charles Laughton.