fix issue with entity index resolution

[mshaban-msft]

scenario:

• utterance: "i want to book a flight ticket from cairooo to london"
• database: "cairo", "new york", ... matches: { "cairo": [ {"token": "from cairo"}, {"token": "cairo"}, {"token": "cairo to"} ] }

problem is, this should only be cairo

proposed solution: use another similarity measure in post processing to get more accurate result problem: single database record existing in multiple parts of the utternace utterance: "i'm from Algeria, Algeria and my name is ..." { "Algeria": [ {"token": "from Algeria"}, {"token": "Algeria Algeria"}, {"token": "Algeria to"} ] }

we need to resolve two entities not just one!