We used three existing parallel text resources as the basis for the sentence selection so as to cover a broad range of online courses and to cover all eleven language pairs.
we use parallel texts from course material of the Coursera MOOC platform, the Iversity MOOC platform, and the QCRI Educational Domain (QED) Corpus (formerly known as QCRI AMARA Corpus) (Abdelali et al., 2014).