To use the trained and deployed model please open AI Platform and navigate to your model.
It should look similar to this:
Open the model and choose your version then click on the Tab TEST & USE and enter the following input data:
{"instances": ["London on Monday evening"]}
After a couple of seconds, you get the prediction response
{
"predictions": [
[
"B-geo",
"O",
"B-tim",
"I-tim",
]
]
}