I want to know the answer to the following question:
What is the number of missing persons?
All the background I'm provided with is that "According to Chinese state officials, the quake caused 69,180 known deaths including 68,636 in Sichuan province; 18,498 people are listed as missing, and 374,176 injured, but these figures may further increase as more reports come in.[dated info]". Is that enough to answer the question?
Answer: yes