Array
(
[person_1@gmail.com] => Array
(
[2017-07-10] => Array
(
[0] => more lines
[1] => yet another line
)
[2017-01-05] => Array
(
[0] => this is line one
[1] => this is line two
)
[2016-05-05] => Array
(
[0] => this is another line
[1] => and this is a fourth line
)
)
[person_2@gmail.com] => Array
(
[2015-01-01] => Array
(
[0] => line for person_2
)
)
)