Cine Quiz

[Plum]

Ok, a very tough one - multi-lingual to make it difficult.

Actress A1 made her "Indhiya cinemavil mudhal muRaiyAga" debut in Director D1's film F1. The music was by MD1
D1s son A1a made his "tamizh cinemavil mudhal muRaiyAga" debut with film F1a, with music by MD1a
D1s son A1b made his "tamizh cinemavil mudhal muRaiyAga" debut with film F1b, with music by MD1b, director was D1b
Actress A1 made her "tamizh cinemavil mudhal muRaiyAga" debut in Director D2's film F2. The music was by MD2.
D2 had made his debut with music by MD1
D1b's first film F1b flopped but he went on to gain acclaim with film F2b, whose music was scored by MD2b
MD1, MD1a and MD1b are related
MD2 and MD2b are related

Find the Variables in the above equations.