Nondeterministic disambiguation

[nielstron]

Describe the bug As mentioned in #161, for some inputs the output of the disambiguation tool seems nondeterministic. This is undesired behaviour.

To Reproduce Results for "1mw"

Expected behavior Always return either "milliwatt" or "megawatt", however not random ones.

Additional information:

• Classifier activated/ sklearn installed: yes

Additional context As pointed out in #162 , by running next(iter(..)) the entity and unit disambiguation may be non-deterministic