use of qui before en

Question

first recording, paragraph 2. why is qui being used before en. LA REVOLUTION DE JUILLET 1830 EN FRANCE, QUI, EN SEULEMENT.

Accepted Answer

Bonjour Nisha,
Chris's and Maarten's answers complement each other brilliantly. 
qui = which -> relative pronoun / see link: qui-to-say-who-which-or-that-relative-pronouns
en = in + duration -> preposition of time / see link: en-versus-dans-prepositions-of-time
I hope this is helpful.
Bonne journée !

Answer

That is a complex sentence and you need to read the sentence as a whole.  Qui is the subject of the verb voire ( qui ... voit), relative pronoun for “la revolution ...”.; qui is translated as ‘which’ in the transcript.
 “La révolution ...” is the subject of the verb “inspirer” (La révolution ... inspire) which continues the main clause.
Do you know you can click on the transcript for translation and the pertinent lessons - the lesson on qui as relative pronoun is linked to that phrase.

Answer

La Révolution, qui, en seulement trois jours, .... en + timespan = within timespanen seulement trois jours -- within only three days.