Summarise A Long Lecture Recording Into Study Notes

You recorded the lecture because typing fast enough was never going to happen, and now there is an hour of audio to somehow turn into notes. This structures a transcript into headed, bulleted notes and flags anything the lecturer specifically said would matter.

Read the lecture transcript pasted below and produce structured study notes from it. Organise the notes under clear headings for each major topic covered, using bullet points for facts, definitions, and examples. Flag anywhere the lecturer explicitly stressed something was important or likely to come up in assessment, marking it with "KEY:" at the start of the line. Exclude filler, digressions, and administrative announcements unrelated to the content. Transcript: {LECTURE_TRANSCRIPT}