Euro-bred winners

    In this new semi-weekly series, the TDN takes a look at the notable successes of European-based sires in North America. This week's column, Feb. 4-10, is highlighted by the victory of upwardly mobile mare Quattroelle (Ire) (Mehmas {Ire}) in the GIII Megahertz S. on Saturday.   No 'Quat'er Given In Megahertz Tally-Ho Stud's rising stallion star Mehmas has gone from strength to strength with his progeny, and his freshly minted 5-year-old daughter Quattroelle became his 12th graded/group winner from just three crops to race when running out a half-length...