Complex sentence: When she was 14 in 1997 she placed 4th at the 1st World Woman Amateur Baduk Championship in Seoul, then in the autumn she placed 2nd at the 2nd European Woman Amateur Go Championship.
Split into simpler sentences: When she was 14 she placed 4th at the 1st World Woman Amateur Baduk Championship held in 1997 in Seoul. In the following autumn she placed 2nd in the 2nd European Woman Amateur Go Championship.