{"summary":
"Oil",
"transaction":
{
"amount":
100.0,
"attendees":
[
"Xingyun27221@gmail.com",
"zhangdi@umich.edu",
"ycled2012@gmail.com",
"Chbeiyou@gmail.com"
],
"paidby":
[
"Xingyun27221@gmail.com",
"Chbeiyou@gmail.com"
]
}
}