I don't know exactly :-).
But, ever since I came to Cyprus, I have observed two more copies-insipirations in Indian cinema from the rest of the world.
In the first week of coming to Cyprus, I was getting bored of watching greek tv channels. But, most of these greek channels feature some English movies in the nights.
This was about one movie I saw then named Dead Poet's Society
starring Robin Williams
One of Chopra's romantic musicals, 'Mohabbatein' which looks similar in more than plot with the Robin Williams' movie.
Can we call this inspiration, copying.. ???
Google Search: dead poet's society mohabbatein
And, another instance was a song in a telugu movie 'Varsham', which became hugely popular in Andhra Pradesh was actually copied from a greek song called 'Sarampel'. Only after coming to Cyprus, I realised this.
Ignorance is bliss :-D.
Personally, I feel inspiration is positive where as copying is somewhat should be discouraged either by law or by society.