Task: Sentence Expansion
Input (English): As a philosopher , Ernst Haeckel wrote " Die Weltra ̈ tsel " ( 1895 – 1899 , " The Riddle of the Universe " , 1901 ) , and " Freedom in Science and Teaching " to support teaching evolution .
Output (English): As a philosopher , Ernst Haeckel wrote " Die Weltra ̈ thsel " ( 1895 – 1899 ; in English : " The Riddle of the Universe " , 1901 ) , the genesis for the term " world riddle " ( " Weltra ̈ tsel " ) ; and " Freedom in Science and Teaching " to support teaching evolution .