Create new table with custom column name

Hey guys,

I feel this is a very basic question. 

So I have this expression which creates a new table and which works fine:

Helper Summary Table = 
{
    (
        SELECTCOLUMNS(TOPN(1, r_fs, r_fs[date_created], DESC), "country_value", [country_1_value]),
        SELECTCOLUMNS(TOPN(1, r_fs, r_fs[date_created], DESC), "country_name", [country_1_name]) 
    ),
    (
        SELECTCOLUMNS(TOPN(1, r_fs, r_fs[date_created], DESC), "country_value", [country_2_value]),
        SELECTCOLUMNS(TOPN(1, r_fs, r_fs[date_created], DESC), "country_name", [country_2_name]) 
    ),
}

The resulting output is a table with the right format - i.e. two columns "Value1" and "Value2" with two data rows. 

How can I rename the "Value1" and "Value2" fields to a custom name?