ASK WHERE { <http://dbpedia.org/resource/Henry_David_Thoreau> <http://dbpedia.org/property/mainInterests> <http://dbpedia.org/resource/Politics> }
Is Henry David Thoreau interested in Politics?
ASK WHERE { resource:Henry_David_Thoreau property:main_interests resource:Politics }
Yes
[Yes], Politics is one of the main interests of Henry David Thoreau.
[Yes] politics is one of Henry David Thoreau's main interests.
[Yes], Politics is  the main interests of him.
[Yes] politics is his main interest.