Return every name whose language is fr, next to the compound it belongs to. The names table stores a language on each row: 'en', 'de' or 'fr'. Order by compound name, then by the name itself. Nine rows answer this, and some are missing their accents — the source stores them that way, so Dithyle oxyde is what a query returns for diethyl ether.
A beginner exercise, answered in SQL. It is marked by the rows your query returns rather than by how you wrote it, with 2 hints if you want them.
Ask the same question of a chemical dataset in SQL and in Mango and compare the two answers. The database is a SQLite file your browser downloads once and queries locally, so nothing you write ever leaves your machine — which is also why the tool needs JavaScript.