def move_up
			self.survey.node_maps.select { |i|
				i.node == self
			}.collect { |node_map|
				begin
					node_map.move_left
				rescue
				end
			}
		end
def move_up
			self.survey.node_maps.select { |i|
				i.node == self
			}.collect { |node_map|
				begin
					node_map.move_left
				rescue
				end
			}
		end
Moves answer up relative to other answers