form from (something)
To arise or be created from something else. This novel formed from unpublished short stories that I wrote in college. An idea for an arrangement began to form from the notes Bill was playing.
form from something
[for something] to develop from something; [for something] to assume a shape, using something else as raw material. Suddenly, an idea began to form from the things that you had said. It seemed that a figure was forming from the mists arising from the swamps.