The file greek_english_lexicon_lsj.xml comes from Perseus, where is was called 1999.04.0057.xml (http://sourceforge.net/projects/perseus-hopper/) and licensed under the Mozilla Public License 1.1 (MPL 1.1).
The files greek-analyses_1/2.json contains definitions for words present in greek text corpus. The definitions are scraped from the Perseues website using scraper.py. The words entries present here are in Beta code form.
python3 scraper.py <input_filename> <output_filename> <language>
The scraper tries to fetch definitions for words present in the input file at start of each line.