Name the total number of main contestants for safe position for tina parekh
{'header': ['Main contestant', 'Co-contestant (Yaar vs. Pyaar)', 'Date performed', 'Scores by each individual judge', 'Total score/week', 'Position', 'Status'], 'page_title': 'Kabhi Kabhii Pyaar Kabhi Kabhii Yaar', 'page_id': '', 'types': ['text', 'text', 'text', 'text', 'text', 'text', 'text'], 'id': '1-18278508-4', 'section_title': 'Week 4: July 30 and 31, 2008', 'caption': 'Week 4: July 30 and 31, 2008', 'rows': [['Kashmira Shah', 'Mukul Dev', 'July 30', '8 + 9 + 10 = 27', '56/60', 'Top 2', 'Current'], ['Kashmira Shah', 'Krushna Abhishek', 'July 31', '9 + 10 + 10 = 29', '56/60', 'Top 2', 'Current'], ['Vishal Singh', 'Dimple Jhangiani', 'July 30', '1 + 7 + 5 = 13', '35/60', 'Bottom 2', 'Eliminated'], ['Vishal Singh', 'Pranita Sahu', 'July 31', '7 + 7 + 8 = 22', '35/60', 'Bottom 2', 'Eliminated'], ['Karanvir Bohra', 'Tina Parekh', 'July 30', '5 + 7 + 8 = 20', '46/60', 'Safe', 'Current'], ['Karanvir Bohra', 'Teejay Sidhu', 'July 31', '7 + 10 + 9 = 26', '46/60', 'Safe', 'Current'], ['Jatin Shah', 'Shalini Chandran', 'July 30', '7 + 7 + 5 = 19', '41/60', 'Bottom 2', 'Current'], ['Jatin Shah', 'Priya Bhatija', 'July 31', '6 + 8 + 8 = 22', '41/60', 'Bottom 2', 'Current'], ['Mridul Singhvi', 'Wasna Ahmed', 'July 30', '8 + 10 + 9 = 27', '48/60', 'Top 2', 'Current']], 'name': 'table_18278508_4'}