What year was the Lincoln Memorial built?
1914
1922
1922
1922
1922
1922
1931
1922
1931
1922
1931
1921
1922
1931
1921
1922
1931
1921
1915
1922
1931
1921
1915
1922
1931
1921
1915
1922
1931
1921
1915
1922
1931
1921
1915
1922
1914
1914
1931
1921
1915
1922
1914
1931
1921
1915
1922
1914
1931
1921
1915
1922
1923
1914
1924
1932
1914
1931
1921
1915
1922
1923
1924
1932
1914
1931
1921
1915
1922
1923
1924
1914
1932
1931
1921
1915
1922
1923
1914
1924
1939
1932
1913
1914
1931
1921
1915
1923
1924
1939
1932
1913
1914
1922.
1931
1921
1915
1923
1924
1939
1914
1932
1909
1913
1931
1921
1922.
1915
1923
1914
1924
1939
1932
1909
1913
1914
1931
1921
1915
1923
1924
1939
1932
1909
1922.
1913
1914
1931
1921
1915
1923
1924
1939
1914
1932
1909
1922,
1913
1921
1922.
1915
1923
1914
1927
1924
1939
1932
1913
1922,
1914
1909
1921
1921.
1915
1923
1924
1939
1932
1922.
1920
1913
1914
1927
1922,
1915
1923
1924
1939
1920
1914
1932
1909
1921.
1913
1922,
1922.
1926
1915
1920
1923
1924
1939
1932
1913
1927
1920
1921.
1922,
1923
1924
1939
1903
1932
1909
1922.
1920
1926
1913
1923
1927
1922,