In order to simulate this scenario we create a set of variations of the EuroParl corpus by treating some documents as if they have no parallel/comparable texts -i.e., we put each of these documents in a single-document tuple.
to do this, we divide the corpus W into two sets of document tuples: a "glue" set G and a "separate" set S such that |G| / |W| = p. the proportion of tuples in the corpus that are treated as "glue" (i.e., placed in G) is p. For every tuple in S, we assign each document in that tuple to a new singledocument tuple.