group1 1 {mrca(A/Singapore/ON2081/2009|2009.701,A/Vienna/INS366/2009|2009.975)} 
group2 1 {mrca(A/Ethiopia/45/2010|2010.016,A/Netherlands/2143/2009|2009.877)} {mrca(A/Liaoning/SWL1/2009|2009.444,A/CHIBA-C/62/2009|2009.556)}
group3 1 {mrca(A/Mexico_City/WR1695N/2009|2009.751,A/Argentina/HNRG8/2009|2009.444)} {mrca(A/San_Salvador/WR0167N/2009|2009.438,A/El_Salvador/1553/2009|2009.534)}
