question: We need oxygen masks when we climb Everest because the air pressure is
choices.text: low high
choices.label: A B
para: Air pressure is less at higher elevations.
para_anno.effect_prop: air pressure
para_anno.cause_dir_str: higher
para_anno.effect_dir_str: less
para_anno.cause_dir_sign: MORE
para_anno.effect_dir_sign: LESS
para_anno.cause_prop: height
question_anno.more_effect_dir: high
question_anno.less_effect_dir: low
question_anno.more_effect_prop: air pressure
question_anno.less_effect_prop: air pressure
question_anno.less_cause_dir: air pressure