Aniline undergoes nitration reaction with $({\mathrm{HNO}}_3+{\mathrm{H}}_2{\mathrm{SO}}_4)$. Although amino group is ortho and para directing but due to presence on lone pair on both the nitrogen, it will cause repulsion, hence the yield of ortho nitro aniline will be only 2%., para product (51%) and meta product (47%)