Assertion: spiral staircase | /r/HasProperty | built
Facets:
value: in order to make
type: PURPOSE
Source sentences:
text: Later in the history of stairs, spiral stairs wede used in clastles for military reasons, the proliferation of spiral stairs in castles was not casual, they allow a strategic position to the soldier who defended the castle, these spiral staircases and railings were built in order to make the solder placed in top an advantage, this soldier would have his right hand full of space to move his sword, while the woldier placed on the bottom would constantly hit the wall whily fighting, because he would have blocked part of the range of motion of his right, besides, his head would be easy to reach for his opponent, the lack of handrails was not casual, the aim was to push the opponent over the edge of the stair.