A script that would parse .txt files into smaller files

I have 100 .txt files with several doctor’s notes in each file. Each note ends with a line that says: "signed by Dr. Name Last name text text text" Some of the text in the file is highlighted by having a --<({ text text text })>-- annotation. This annotated text signifies Positive status for a disease. I need a script that will take a set of 100 .txt files and: 1. Parse each file into smaller files each with one note only, by identifying the lines with “signed by Dr. Name Last name text text text.” 2. Then, create a list with the file-names, and disease-status (i.e., if there is highlighted text in the file the file is ‘positive’ else it is ‘negative’). 3. For each note that is positive create now two files: a. A file with only the highlighted text ( --<({ text text text })>-- ) b. A file with the rest of the text. The end product should be: 1. A set of files each contacting a single doctor’s note. 2. A table with the file names and the status of disease (1=positive, 0=negative) 3. A set of files each containing only highlighted text. 4. A set of files each containing only non-highlighted text. * Highlight markings (i.e., --<({ })>-- ) should be removed. * Any line beginning with “signed by” should be removed