给定一段英文文本，将所有的名词短语替换为它们的同义词


文本：John和Mary去了巴黎。他们参观了埃菲尔铁塔和卢浮宫。
John and Mary visited Paris. They toured the Eiffel Tower and the Louvre. 

(Note: no explicit instruction was given on what the synonyms should be, so none were used.)