if element[2].find('source') > 0:
sources.append(' %s_%s' % tuple(elem.strip(' ') for elem in element[:2]))
element[2] = re.sub('source\s?,?', '', element[2]).strip(' ')
if element[2].find('source') > 0:
sources.append(' %s_%s' % tuple(elem.strip(' ') for elem in element[:2]))
element[2] = re.sub('source\s?,?', '', element[2]).strip(' ')