Better support of "Lincoln, Nebraska" in spatial value

[FuhuXia]

We support string value for spatial field such as Lincoln, Nebraska, as documented here. But in reality:

• Lincoln, NE is supported, NOT Lincoln, Nebraska
• Brown County, Nebraska is supported, NOT Brown County, NE

The reason is the how the values are present in the locations table. We need to introduce some logic in the code so that all four values are supported.

How to reproduce

See the difference in the query results:

catalog=# select name from locations where name like '%Nebraska';
catalog=# select name from locations where name like '%NE';

Sketch

[Notes or a checklist reflecting our understanding of the selected approach]

[hkdctol]

Moving to icebox for now