1school_schedule = <
2    lesson_times = <08:30:00, 09:30:00, 10:30:00, ...>
3
4    locations = <
5        [1] = <"under the big plane tree">
6        [2] = <"under the north arch">
7        [3] = <"in a garden">
8    >
9
10    subjects = <
11        ["philosophy:plato"] = < -- note construction of key
12            name = <"philosophy">
13            teacher = <"plato">
14            topics = <"meta-physics", "natural science">
15            weighting = <76%>
16        >
17        ["philosophy:kant"] = <
18            name = <"philosophy">
19            teacher = <"kant">
20            topics = <"meaning and reason", "meta-physics", "ethics">
21            weighting = <80%>
22        >
23        ["art"] = <
24            name = <"art">
25            teacher = <"goya">
26            topics = <"technique", "portraiture", "satire">
27            weighting = <78%>
28        >
29    >
30>
31