how to clear the nested maps

[new1]

i want to know how to clear the contents in map and list which are in nested like as below
can anyone help me in this.

 list<string>my_list;
map<string,my_list > map1;
map<string, map1> map2;

[Peter87]

http://en.cppreference.com/w/cpp/container/map/clear

map2.clear();

[new1]

thanks for reply,
If i use the above , it will only for map2 i.e of outer map and is that apply for inner map or not .

and can i use the same for clearing the list right.