Table:
text: So You Think You Can Dance (U.S. season 4)
Judges' picks
Judges' picks
Couple Style_ Music Choreographers Chosen_by
Katee Shean Joshua Allen Bollywood Dhoom Taana from Om Shanti Om Nakul Dev Mahajan Nigel Lythgoe
Courtney Galiano Gev Manoukian Rumba  Wishing on a Star — Rose Royce Tony Meredith Melanie LaPatin assisting Mary Murphy
Comfort Fedoke Stephen Twitch Boss Hip-Hop  Forever — Chris Brown Dave Scott Adam Shankman
Chelsie Hightower Mark Kanemura Lyrical hip-hop  Bleeding Love — Leona Lewis Tabitha and Napoleon D`umo Lil` C
Katee Shean William Wingfield Pas de deux  Imagine — David Archuleta Dwight Rhoden Desmond Richardson Mia Michaels
Courtney Galiano Mark Kanemura Jazz The Garden— Mirah Sonya Tayeh Adam Shankman

text: So You Think You Can Dance (U.S. season 4)
Judges' picks
Judges' picks
Couple Style_ Music Choreographers Chosen_by
Katee Shean Stephen Twitch Boss Contemporary  Mercy — Duffy Mia Michaels Mary Murphy
Kherington Payne Stephen Twitch Boss Viennese Waltz  A New Day Has Come — Celine Dion Jean-Marc Généreux France Mousseau assisting Debbie Allen
Katee Shean Joshua Allen Lyrical hip-hop  No Air — Jordin Sparks & Chris Brown Tabitha and Napoleon D`umo Nigel Lythgoe

Question: What is Chosen By, When Couple is Katee Shean Joshua Allen and When Choreographer(s) is Nakul Dev Mahajan among the So You Think You Can Dance (US Season 4) judges' picks?