Complex sentence: She came second in her heat and 21st total with a time of 8:38.19 seconds, being 8 seconds off the slowest qualifying time of 8:25.55 seconds by Mireia Belmonte of Spain.
Split into simpler sentences: She came second in her heat and 21st total with a time of 8:38.19 seconds. Hassler was 8 seconds off the slowest qualifying time of 8:25.55 seconds by Mireia Belmonte of Spain.