Question: Which American multinational corporation headquartered in San Jose, California , developed a keychain RFID device introduced in 1997 by Mobil Oil Corp?
Sentence (from "San Jose Municipal Stadium"): The San Jose Municipal Stadium, or Muni Stadium in common usage, is the home of the minor league baseball San Jose Giants, the Advanced A league affiliate of the San Francisco Giants located in San Jose, California.
Relevant evidence: No