<human>: Does "A major turning point in the development of DC machines took place in 1864, when Antonio Pacinotti described for the first time the ring armature with its symmetrically grouped coils closed upon themselves and connected to the bars of a commutator, the brushes of which delivered practically non-fluctuating current." contain the correct answer to "What made Pacinotti's motor an important advancement?"
OPTIONS:
- yes
- no
<bot>: yes