Complex sentence: Samson Kiflemariam Gashazghi (born 23 January 1984) is an Eritrean long-distance runner who specializes in the 5000 metres, cross-country running, but as mountain runner he won 2010 World Mountain Running Championships.
Split into simpler sentences: Samson Kiflemariam Gashazghi (born 23 January 1984) is an Eritrean long-distance runner who specializes in the 5000 metres, cross-country running. And as mountain runner he won 2010 World Mountain Running Championships.