$1!=B!8{!0=!`1s - $1!;U'^^'C-s ($1!04K7os $1!7e!<4!3K!JH!_A'7s!5#!7e!<4!0d!FM!3K!JH!Nas, 2005)
Keywords: $1!04K7o!BX!4H!5=(B--$1'5+'CUs