question: What was one of the most often seen weapons that was used both on land and sea ?
answer: 1940-origin Flakvierling quadruple-20 mm-gun antiaircraft weapon system
turker_answer: One of the most often seen weapons that was used on both land and sea was the 1940-origin Flakvierling quadruple-20 mm-gun antiaircraft weapon system .
rule-based: One of the most often seen weapons that was used both on land and sea was 1940-origin Flakvierling quadruple-20 mm-gun antiaircraft weapon system .