Determine the sentiment:

The first 50 minutes of this movie were quite boring. It focused on the personal problems Doyle had, including his sick wife, death threats by fans, a pushy publisher and feelings of guilt concerning his mentally ill father. Even though these subjects had an important impact on Doyle's life, I was more curious about the birth of Sherlock Holmes. The last 40 minutes were excellent. We finally got a look inside Doyle head, how he created Holmes and why he had to 'kill' Holmes. The actors are excellent. Including the intriguing Selden played by Tim McInnerny, Arthur Conan Doyle, a compelling role played by Douglas Henshall and Brian Cox as the 'role model' for Sherlock Holmes, Dr. Bell. The locations are good, especially for a TV movie and the camera work is nice. If the first 50 minutes were as good the the last 40 minutes this would have been a small masterpiece.
positive