I am using Query Builder in QGIS 2.14.2-Essen to select one country (Peru) among 237 for which to show two layers (states_provinces, boundary lines) from the Natural Earth database. I am paying close attention to corresponding attribute tables. However, a recurring error message is generated: "OGR: SQL Expression Parsing Error; syntax error, unexpected end of string." The screenshot of the message is below.
I have been unsuccesful at resolving this issue, despite widely searching the web.