tokens: If you are using US regional settings then your text is a valid date/time format once you remove " GMT " and everything after so you can use a formula that will simply remove that part and " co-erce " to a date/time value , i.e .
ner_tags: O O O O O O O O O O O O O O O O O O B-Value I-Value I-Value O O O O O O O O O O O O O O O O O O O O O O O O O O