Rwanda at the 2012 Summer Olympics
Swimming
Table:
Athlete	Event	Heat	Semifinal	Final

Time	Rank	Time	Rank	Time	Rank

Jackson Niyomugabo	50 m freestyle	27.38	52	Did not advance

Studying the data table for 'Rwanda at the 2012 Summer Olympics' titled 'Swimming', produce a single-sentence summary focused on the highlighted cells and provide it inside the JSON object {"answer": "YOUR ANSWER"}.