question: What is the Western Front ?
answer: a system of opposing manned trenches and fortifications ( separated by a `` No man 's land '' ) running from the North Sea to the border of Switzerland .
turker_answer: The Western Front is a system of opposing manned trenches and fortifications ( separated by a `` No man 's land '' ) , running from the North Sea to the border of Switzerland .
rule-based: The Western Front is a system of opposing manned trenches and fortifications ( separated by a `` No man 's land '' ) running from the North Sea to the border of Switzerland .