12
Person1
PRESENT
Person2
PRESENT
Person4
NOT PRESENT
Person7
NOT PRESENT
Person9
PRESENT
Person12
PRESENT
Person13
NOT PRESENT
Person15
NOT PRESENT
Person16
PRESENT
Person18
PRESENT
Person20
PRESENT
Person21
PRESENT
10
Person0:Person1,Person2
Person3:Person0,Person4
Person5:Person2,Person3
Person6:Person4,Person7
Person8:Person3,Person9
Person10:Person0,Person1
Person11:Person12,Person13
Person14:Person15,Person16
Person17:Person12,Person18
Person19:Person20,Person21