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Subject
- Xenophon30
- X-rays20
- X Window System (Computer system)11
- X-ray spectroscopy10
- XML (Document markup language)10
- Art, Modern7
- American literature6
- Architecture, Modern6
- Chinese language6
- English language6
- Mathematical physics6
- X-ray astronomy6
- Xenophobia6
- Xi, Jinping6
- American poetry5
- Architecture5
- Photography, Artistic5
- Cyrus, the Younger, approximately 423 B.C.-401 B.C.4
- Gender4
- Gender identity4