Find (If Possible) the Complement Of $\frac { \pi } { 7 }$

Find (if possible) the complement of $\frac { \pi } { 7 }$ .

A) $\frac { 3 \pi } { 7 }$
B) $\frac { 2 \pi } { 7 }$
C) $\frac { 6 \pi } { 7 }$
D) $\frac { 5 \pi } { 14 }$
E) not possible