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- Search terms are automatically joined by AND and truncated with *
- use / for OR
e.g. lake / ocean / sea - use ! for NOT
e.g. water ! lake - use " " to search for a phrase
e.g. "acid precipitation" - use >, <, >=, <= for greater or less than
e.g. >= 2007 finds dates from 2007 onwards
- use : to search a range
e.g. 2001:2012, example:sample - More help is available.