Value for dropout?

The provided TensorFlow model specification for the i3d network includes [dropout right before the last Unit3d layer](https://github.com/deepmind/kinetics-i3d/blob/master/i3d.py#L463). May I ask which value has been used for this dropout during the training on Kinetics and during the fine-tuning experiments?

I couldn't find it in the paper (but maybe its there and I am just blind).