<human>:  Who was the philosopher Ludwig Wittgenstein?
<bot>: Ludwig Wittgenstein was a philosopher who wrote about language and meaning. He was born in Vienna, Austria, in 1889 and died in 1951. He was a student of Edmund Husserl and was influenced by the work of Gottlob Frege. He is best known for his Philosophical Investigations, which contains his thoughts on language and meaning.