This is the main riff played by the string section at various points:

e|--------------------------------|
B|-14-12-12-----------------------|
G|----------11-14-12-12-----11----|
D|----------------------12-----14-|
A|--------------------------------|
E|--------------------------------|   x2

Then later:

e|--------------------------------|--------------------------------|
B|-14-12-12-----------------------|-14-12-12-----------------------|
G|----------11-14-12-12-----11----|----------11-13-14--------------|
D|----------------------12-----14-|--------------------------------|
A|--------------------------------|--------------------------------|
E|--------------------------------|--------------------------------|