Task: Text Categorization
Input (English): He posited that technology was fundamentally enframing, and claimed that facticity was the "thrownness" of existence. A notable lecture by this man dealt with Sophocles' Antigone and "Poeticizing the essence of rivers," and was named after Friedrich Holderlin's poem "Der Ister. " He denied a change in his thinking in a letter published by William Richardson, and that so-called "turn" is exemplified by his Contributions to Philosophy (From Enowning). Other works by this man include Kant and the Problem of Metaphysics and Off the Beaten Track. FTP, name this philosopher who posited a "being for whom being is in question," dasein, in his work Being and Time.
Output (English): Social Science