Problem of ' unknown identifier in data file'

Hi Lammps users,
I ran Lammps using a data file, but Lammps gave me an error message:"ERROR: Unknown identifier in data file: 89 23 1909 1898 1913 1915 (…/read_data.cpp:391).
I checked my data file many many times, but I still can’t find the reason. Can you help me to solve this problem?
The attached is my data file

Many thanks!
Best,
Hua

data.initial (1.14 MB)

Dihedrals
1 14 375 370 369 368
2 16 375 370 369 374

you need a blank like after Dihedrals

Steve