def read_data(e_path, f_path):
"""
Combine two halves of a parallel corpus into one.
:param e_path: path to language 1 file.
:param f_path: path to language 2 file.
:return: a list of tuples with parallel sentences. Sentences consist of
a list of tokens.
"""
fe = open(e_path, "r").read()
ff = open(f_path, "r").read()
corpus = Corpus()
for e, f in zip(fe.split(" \n"), ff.split(" \n")):
e = e.split(' ')
f = f.split(' ')
corpus.add_foreign(set(f))
corpus.corpus.append((Sentence(e, pad=True), Sentence(f)))
return corpus
