| Examples: |
| africa | Search keywords (full text and metadata) for 'africa' |
| south africa | Search keywords for 'south' AND 'africa' |
| "south africa" | Search keywords for the phrase 'south africa' |
| africa* | Search keywords for the string 'africa' followed by 0 or more characters |
| africa? | Search keywords for the string 'africa' followed by a single character |
