Table: kabhi_kabhii_dance
Columns: main_contestant
co_contestant_yaar_vs_pyaar
date_performed
scores_by_each_individual_judge
total_score_week
position
status

Question: Who is the co-contestant (yaar vs. Pyaar) with Vishal Singh as the main contestant?
SQL: SELECT "co_contestant_yaar_vs_pyaar" FROM kabhi_kabhii_dance WHERE "main_contestant" = 'vishal singh'

Question: Who is the main contestant with scores by each individual judge of 8 + 7 + 7 = 21?
SQL: SELECT "main_contestant" FROM kabhi_kabhii_dance WHERE "scores_by_each_individual_judge" = '8 + 7 + 7 = 21'

Question: Who is the main contestant with a total score/week of 42/60 and a co-contestant (Yaar vs. Pyaa) of Tina Sachdev?
SQL: SELECT "main_contestant" FROM kabhi_kabhii_dance WHERE "total_score_week" = '42/60' AND "co_contestant_yaar_vs_pyaar" = 'tina sachdev'

Question: What is Tina Sachdev's position?
SQL: SELECT "position" FROM kabhi_kabhii_dance WHERE "co_contestant_yaar_vs_pyaar" = 'tina sachdev'