Table: senate_elections_1956
Columns: d_48
d_47
d_46
d_45
d_44
d_43
d_42
d_41

Question: What is the D45 associated with a D42 of r 22?
SQL: SELECT "d_45" FROM senate_elections_1956 WHERE "d_42" = 'r 22'

Question: What is the D43 associated with a D41 of r 21?
SQL: SELECT "d_43" FROM senate_elections_1956 WHERE "d_41" = 'r 21'

Question: What is the D42 associated with a D47 of d 27?
SQL: SELECT "d_42" FROM senate_elections_1956 WHERE "d_47" = 'd 27'

Question: What is the D43 associated with a D41 of r 16?
SQL: SELECT "d_43" FROM senate_elections_1956 WHERE "d_41" = 'r 16'