question: Where were Matare and Welker working when inventing the point-contact transistor ?
answer: Compagnie des Freins et Signaux
turker_answer: Matare and Welker were working Compagnie des Freins et Signaux when inventing the point-contact transistor .
rule-based: Matare and Welker were working when inventing the point-contact transistor in Compagnie des Freins et Signaux .