This deck was created by my open-source LexiDeck software, which you can find here: https://github.com/wjrm500/LexiDeck.
It was created by taking the The Oxford 5000, a list of the ~5,000 core words that every learner of English needs to know, and for each word fetching definitions and example sentences from the online dictionary SpanishDict. Notes are only created for the "principal" definitions, i.e., the large, hyperlinked definitions that sit immediately underneath the word being translated, and one note is created for each part of speech (e.g., adjective, noun, verb) to minimise ambiguity.