请按照提供的要求回答我身高和体重的关系这个问题：1）答案必须是json格式的字符串；2）必须包含"height"和"weight"两个字段，并用相关的数据填充；3）添加一个额外的字段"relationship"，字段值描述height和weight的关系；4）不要包含任何额外信息。
user
{"height": "175cm", "weight": "70kg", "relationship": "Generally, a person's weight is proportional to their height, meaning that taller individuals tend to weigh more than shorter individuals."}
assistant