The sentence is incorrect. It should be: This is the factory (which/that) they want to visit. Which (or that ) is the object of to visit and can be omitted in this relative clause.
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Cool Breeze No comma can be used in the relative clause. There are no other correct relative clause versions of it. (A non-matching quote blocks my post, that's why I have had to remove it.)Pardon me, Cool Breeze. This is the factory where they want to vis
Cheers
CB
Grammar GeekWhat's wrong with the construction "This is my home, where I feel the most comfortable."?Hi Grammar Geek
I don't agree that you can't use a comma.