<human>: Q: What issue can complicate electric railway service?
 A: Disadvantages of electric traction include high capital costs that may be uneconomic on lightly trafficked routes; a relative lack of flexibility since electric trains need electrified tracks or onboard supercapacitors and charging infrastructure at stations; and a vulnerability to power interruptions.
 Does the answer correctly answer the question

OPTIONS:
- yes
- no
<bot>: no