What options are available to group results that are effectively duplicates?

For instance this search:

  
http://nominatim.openstreetmap.org/search.php?q=station+road&viewbox=0.13%2C52.2%2C0.14%2C52.19

produces as results 2-5 various small elements of the same Station
Road in Cambridge.

The Nominatim FAQ at point 9 mentions: 'merge place nodes and boundary
relations to avoid duplication'.

I'm wondering whether to do our own post-processing of the result to
group those cases together, whether others have tried something, or
whether there are other options?

One other point: the above search viewbox is highly tightly wrapped
around the station road in Cambridge, yet the first result is a
polygon in Chingford about 80km away!

Simon

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