question: What were the major advantages of the tantalum light filament ?
answer: These lamps were more efficient than even graphitized carbon filaments and could operate at higher temperatures .
turker_answer: The major advantages of the tantalum light filament were that these lamps were more efficient than even graphitized carbon filaments and could operate at higher temperatures .
rule-based: The major advantages of the tantalum light filament were these lamps were more efficient than even graphitized carbon filaments and could operate at higher temperatures .