 Complete the following phrase:  Moving to the senior level, the Parsons debuted at the Lake Placid Ice Dance International, winning the silver medal behind longtime rivals McNamaraCarpenter, who were also making their senior debut. They then took the silver medal at the 2017 CS Ondrej Nepela Trophy, their debut on the ISU Challenger series. Assigned to two Grand Prix events, they finished ninth at Skate America and seventh at the Rostelecom Cup. They then competed at a second Challenger event, the 