Tā de zhàngfu shì xīrén, tāmen zài Wēngēhuá xiāngshí.
Her husband is a Westerner; they met in Vancouver.
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西人 is common in Chinese-Canadian and overseas Chinese communities to refer to white or Western people. It is more polite and neutral than some alternatives. In mainland China, 外国人 or 老外 are more commonly used.