<|im_start|>system
Please reason step by step, and put your final answer within \boxed{}.<|im_end|>
<|im_start|>user
Given the following CIF representation:
data_MnNb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.77
_cell_length_b   4.31
_cell_length_c   4.97
_cell_angle_alpha   90.0
_cell_angle_beta   101.02
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MnNb
_chemical_formula_sum   'Mn2 Nb2'
_cell_volume   58.21
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Mn  Mn0  1  0.9  0.23  0.21  1.0
  Mn  Mn1  1  0.92  0.08  0.66  1.0
  Nb  Nb2  1  0.8  0.08  0.16  1.0
  Nb  Nb3  1  0.03  0.23  0.71  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_MnNb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.77
_cell_length_b   4.31
_cell_length_c   4.97
_cell_angle_alpha   90.0
_cell_angle_beta   101.02
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MnNb
_chemical_formula_sum   'Mn2 Nb2'
_cell_volume   58.21
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Mn  Mn0  1  0.9  0.23  0.21  1.0
  Mn  Mn1  1  0.92  0.08  0.66  1.0
  Nb  Nb2  1  0.8  0.08  0.16  1.0
  Nb  Nb3  1  0.03  0.23  0.71  1.0

What is the crystal system of this material?