What happened to the girl Shamima Begum says convinced her to join the Islamic State group?

Less than 24 hours before this episode was published ,we got the answer.

Reporter: Josh Baker Written and produced by: Josh Baker, Sara Obeidat and Joe Kent Composer: Firas Abou Fakher Theme music: Sam Slater Mix and sound design: Tom Brignell Production coordinators: Janet Staples and Helena Warwick-Cross Series Editor: Jonathan Aspinwall Head of Long Form Audio: Emma Rippon Commissioning Executive: Dylan Haskins

This episode contains some strong language