what is the scoreboard when karen was 4.5
{'header': ['Order', 'Couple', 'Karen', 'Nicky', 'Jason', 'Ruthie', 'Robin', 'Total', 'Skating song', 'Scoreboard', 'Public vote'], 'page_title': '', 'page_id': '', 'types': ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text'], 'id': '1-19744915-3', 'section_title': '', 'caption': '', 'rows': [['1', 'Jeremy & Darya', '3.5', '3.5', '3.0', '2.0', '3.0', '15.0', '" True "— Spandau Ballet', '=3rd', '3.233%'], ['2', 'Donal & Florentine', '2.5', '3.0', '2.5', '2.0', '3.5', '13.5', '" Rockstar "— Nickelback', '6th', '7.691%'], ['3', 'Todd & Susie', '2.0', '1.5', '1.0', '1.5', '1.5', '7.5', '" (Everything I Do) I Do It for You "— Bryan Adams', '7th', '18.155%'], ['4', 'Ellery & Frankie', '3.5', '4.0', '3.0', '3.0', '4.0', '17.5', '" Born To Run "— Bruce Springsteen', '2nd', '9.515%'], ['5', 'Ray & Maria', '4.5', '5.0', '4.5', '4.5', '5.0', '23.5', '" MMMBop "— Hanson', '1st', '42.658%'], ['6', 'Graeme & Kristina', '3.0', '2.5', '3.0', '2.5', '3.5', '14.5', '" I\'ve Got You Under My Skin "— Frank Sinatra', '5th', '5.886%']], 'name': 'table_19744915_3'}