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Animate a Map of the Fall of the Roman Empire
Example Notebook
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Get the start date of the Roman Empire:
I
n
[
1
]
:
=
E
n
t
i
t
y
V
a
l
u
e
R
o
m
a
n
E
m
p
i
r
e
H
I
S
T
O
R
I
C
A
L
C
O
U
N
T
R
Y
,
"
S
t
a
r
t
D
a
t
e
"
O
u
t
[
1
]
=
W
e
d
1
6
J
a
n
-
2
7
I
n
[
2
]
:
=
s
t
a
r
t
=
N
e
x
t
D
a
t
e
[
%
,
"
Y
e
a
r
"
]
O
u
t
[
2
]
=
Y
e
a
r
:
-
2
6
Get a map of the Roman Empire after its inception:
I
n
[
3
]
:
=
s
p
o
l
y
=
E
n
t
i
t
y
V
a
l
u
e
R
o
m
a
n
E
m
p
i
r
e
H
I
S
T
O
R
I
C
A
L
C
O
U
N
T
R
Y
,
D
a
t
e
d
[
"
P
o
l
y
g
o
n
"
,
s
t
a
r
t
]
;
G
e
o
G
r
a
p
h
i
c
s
s
p
o
l
y
,
.
.
.
O
u
t
[
3
]
=
Find the end date of the Roman Empire:
I
n
[
4
]
:
=
e
n
d
=
P
r
e
v
i
o
u
s
D
a
t
e
E
n
t
i
t
y
V
a
l
u
e
R
o
m
a
n
E
m
p
i
r
e
H
I
S
T
O
R
I
C
A
L
C
O
U
N
T
R
Y
,
"
E
n
d
D
a
t
e
"
,
"
Y
e
a
r
"
O
u
t
[
4
]
=
Y
e
a
r
:
3
9
4
Get a map of the empire's territory just before its end:
I
n
[
5
]
:
=
e
p
o
l
y
=
E
n
t
i
t
y
V
a
l
u
e
R
o
m
a
n
E
m
p
i
r
e
H
I
S
T
O
R
I
C
A
L
C
O
U
N
T
R
Y
,
D
a
t
e
d
[
"
P
o
l
y
g
o
n
"
,
e
n
d
]
;
G
e
o
G
r
a
p
h
i
c
s
e
p
o
l
y
,
o
p
t
s
O
u
t
[
5
]
=
Compare the two territories on the same map:
I
n
[
6
]
:
=
G
e
o
G
r
a
p
h
i
c
s
g
r
e
e
n
,
s
p
o
l
y
,
r
e
d
,
e
p
o
l
y
,
o
p
t
s
O
u
t
[
6
]
=
Track the progression by decade:
I
n
[
7
]
:
=
p
o
l
y
g
o
n
s
=
#
,
E
n
t
i
t
y
V
a
l
u
e
R
o
m
a
n
E
m
p
i
r
e
H
I
S
T
O
R
I
C
A
L
C
O
U
N
T
R
Y
,
D
a
t
e
d
[
"
P
o
l
y
g
o
n
"
,
#
]
&
/
@
d
a
t
e
s
;
L
i
s
t
A
n
i
m
a
t
e
L
a
b
e
l
e
d
G
e
o
G
r
a
p
h
i
c
s
o
r
a
n
g
e
,
L
a
s
t
[
#
]
,
o
p
t
s
,
F
i
r
s
t
[
#
]
&
/
@
p
o
l
y
g
o
n
s
O
u
t
[
7
]
=
D
e
c
a
d
e
:
2
0
-
1
0
B
C
Related Symbols
Entity
EntityValue
DateValue
GeoGraphics
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