Sentence:  A <WSD>Martian</WSD> who landed in Britain in the past few weeks—assuming he managed to get a visa—would take it for a place that dislikes visitors. [...] And yet, if he lingered, the <WSD>Martian</WSD> might find himself being asked how health care was organised on his planet, or how its retailers were coping with the internet. 
Meaning of the word marked with <WSD> tags:  An inhabitant of the planet Mars.