sentence1: On 24 July the NH - electrification to New Rochelle began , on 5 August to Port Chester and on 6 October 1907 the rest of the route to Stamford .
sentence2: On 24 July the NH - electrification to New Rochelle began , on 5 August to Stamford and on 6 October 1907 the rest of the route to Port Chester .