dataviz/courses/lab03_data/notes.csv

Date	Alice	Bob	Claire	David
1/1/2019	14	10	18	9
1/15/2019	16	11	19	10
2/1/2019	15	11	18	12
2/15/2019	17	10	19	11
3/1/2019	14	15	19	14
3/15/2019	15	13	20	13
4/1/2019	13	12	19	14
4/15/2019	15	12	19	15
5/1/2019	16	13	17	14
5/15/2019	17	11	18	15