I would like to have only the rows where "country_o" and "country_d" are available.
| country_o | country_d | values |
|---|---|---|
| Italy | Turkiye | 123 |
| NA | Turkiye | 87 |
| Spain | NA | 93 |
| Spain | Germany | 235 |
How can I eleminate the rows if one of the two columns has NA?
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