what's the party with opponent being mike oxley (r) unopposed
{'header': ['District', 'Incumbent', 'Party', 'First elected', 'Status', 'Opponent'], 'page_title': 'United States House of Representatives elections, 1994', 'section_title': 'Ohio', 'caption': 'Ohio', 'rows': [['Ohio1', 'David S. Mann', 'Democratic', '1992', 'Defeated Republican gain', 'Steve Chabot (R) 56.1% David S. Mann (D) 43.9%'], ['Ohio2', 'Rob Portman', 'Republican', '1993', 'Re-elected', 'Rob Portman (R) 77.6% Les Mann (D) 22.4%'], ['Ohio4', 'Mike Oxley', 'Republican', '1981', 'Re-elected', 'Mike Oxley (R) unopposed'], ['Ohio5', 'Paul Gillmor', 'Republican', '1988', 'Re-elected', 'Paul Gillmor (R) 73.4% Jarrod Tudor (D) 26.6%'], ['Ohio6', 'Ted Strickland', 'Democratic', '1992', 'Defeated Republican gain', 'Frank Cremeans (R) 50.9% Ted Strickland (D) 49.1%'], ['Ohio7', 'Dave Hobson', 'Republican', '1991', 'Re-elected', 'Dave Hobson (R) unopposed'], ['Ohio8', 'John Boehner', 'Republican', '1990', 'Re-elected', 'John Boehner (R) unopposed'], ['Ohio9', 'Marcy Kaptur', 'Democratic', '1982', 'Re-elected', 'Marcy Kaptur (D) 75.3% Randy Whitman (R) 24.7%'], ['Ohio11', 'Louis Stokes', 'Democratic', '1968', 'Re-elected', 'Louis Stokes (D) 77.2% James J. Sykora (R) 22.8%'], ['Ohio12', 'John Kasich', 'Republican', '1982', 'Re-elected', 'John Kasich (R) 66.5% Cynthia L. Ruccia (D) 33.2%'], ['Ohio14', 'Thomas C. Sawyer', 'Democratic', '1986', 'Re-elected', 'Thomas C. Sawyer (D) 51.9% Lynn Slaby (R) 48.1%'], ['Ohio15', 'Deborah Pryce', 'Republican', '1992', 'Re-elected', 'Deborah Pryce (R) 70.7% Bill Buckel (D) 29.1%'], ['Ohio16', 'Ralph Regula', 'Republican', '1972', 'Re-elected', 'Ralph Regula (R) 75.0% J. Michael Finn (D) 25.0%']]}