Backgrounded constituents cannot be “extracted”

Arts and Humanities

• Long-distance dependencies 100%
• Violations 66%
• Island Constraint 33%
• Turnout 33%
• Relative Clause 33%
• Resurgence 33%
• clash 33%
• WH-questions 33%

Keyphrases

• Subject Island 33%
• Relative Clauses 33%
• Complex NP 33%
• Island Constraints 33%
• Section 11 33%
• Wh-questions 33%

Psychology

• Relative Clause 100%