What was the margin of victory at the Mercedes Championships?
{'header': ['No.', 'Date', 'Tournament', 'Winning score', 'To par', 'Margin of victory', 'Runner(s)-up'], 'page_title': "Mark O'Meara", 'section_title': 'PGA Tour wins (16)', 'caption': 'PGA Tour wins (16)', 'rows': [['1', 'Sep 16, 1984', 'Greater Milwaukee Open', '67-68-69-68=272', '–16', '5 strokes', 'Tom Watson'], ['2', 'Feb 3, 1985', 'Bing Crosby National Pro-Am', '70-72-68-73=283', '–5', '1 stroke', 'Kikuo Arai , Larry Rinker , Curtis Strange'], ['3', 'Feb 10, 1985', 'Hawaiian Open', '67-66-65-69=267', '–21', '1 stroke', 'Craig Stadler'], ['4', 'Jan 29, 1989', 'AT&T Pebble Beach National Pro-Am', '66-68-73-70=277', '–11', '1 stroke', 'Tom Kite'], ['5', 'Feb 4, 1990', 'AT&T Pebble Beach National Pro-Am', '67-73-69-72=281', '–7', '2 strokes', 'Kenny Perry'], ['6', 'Oct 7, 1990', 'H.E.B. Texas Open', '64-68-66-63=261', '–19', '1 stroke', 'Gary Hallberg'], ['7', 'Oct 16, 1991', 'Walt Disney World/Oldsmobile Classic', '66-66-71-64=267', '–21', '1 stroke', 'David Peoples'], ['8', 'Feb 2, 1992', 'AT&T Pebble Beach National Pro-Am', '69-68-68-70=275', '–13', 'Playoff', 'Jeff Sluman'], ['9', 'Mar 12, 1995', 'Honda Classic', '68-65-71-71=275', '–9', '1 stroke', 'Nick Faldo'], ['10', 'Sep 10, 1995', 'Bell Canadian Open', '72-67-68-67=274', '–14', 'Playoff', 'Bob Lohr'], ['11', 'Jan 7, 1996', 'Mercedes Championships', '68-69-66-68=271', '–17', '3 strokes', 'Nick Faldo , Scott Hoch'], ['12', 'Apr 28, 1996', 'Greater Greensboro Chrysler Classic', '75-68-62-69=274', '–14', '2 strokes', 'Duffy Waldorf'], ['13', 'Feb 2, 1997', 'AT&T Pebble Beach National Pro-Am', '67-67-67-67=268', '–20', '1 stroke', 'David Duval , Tiger Woods'], ['15', 'Apr 12, 1998', 'Masters Tournament', '74-70-68-67=279', '–9', '1 stroke', 'Fred Couples , David Duval']]}