jared quirk , 18 , was in athens with classmates from rockland , massachusetts , to see the ancient world - but fell to the ground .
jared quirk , who died in greece this week , becoming the third student in his school year to die within six months .
quirk 's death follows that of joshua rose , a 17-year-old student at the school , who died suddenly on october 1 for reasons which were not explained in depth .