Corelate and infer from the data. If you can't distinguish between similarly named films, you still have the director and cast and years when they are active, a

Corelate and infer from the data. If you can't distinguish between similarly named films, you still have the director and cast and years when they are active, along with country, production studio and countless other attributes. A single data source is never effective anyway. Along with data sources you will also need a production process and streamlined workflow. It's a holistic, iterative exercise.