claim: Azithromycin is sold under different trade names.
evidence: The 63rd 500 Mile International Sweepstakes was held at the Indianapolis Motor Speedway in Speedway , Indiana , on Sunday May 27 , 1979 .. Indianapolis Motor Speedway. Indianapolis Motor Speedway. Second-year driver Rick Mears took the lead for the final time with 18 laps to go , and won his first of four Indy 500 races .. Rick Mears. Rick Mears. Brothers Al and Bobby Unser combined to lead 174 laps , but Al dropped out , and Bobby slipped to 5th place at the finish nursing mechanical issues .. Bobby Unser. Bobby Unser. Al Unser. The race was sanctioned by USAC , and was part of the 1979 USAC National Championship .. USAC. United States Auto Club. 1979 USAC. 1979 USAC Championship Car season. 1979 USAC National Championship. 1979 USAC Championship Car season. However , many of the participants entered the race only as a one-off , and instead broke off and took part in the inaugural 1979 SCCA / CART Indy Car Series .. 1979 SCCA / CART Indy Car Series. 1979 SCCA / CART Indy Car Series. CART. Championship Auto Racing Teams. It was the beginning of the first open-wheel `` split . ''. open-wheel. American Championship car racing. The month of May 1979 was filled with controversy on and off the track .. A court injunction was issued after USAC initially denied entries by some teams that were part of the CART series .. USAC. United States Auto Club. CART. Championship Auto Racing Teams. During time trials , several cars were disqualified due to illegal wastegate exhaust pipes .. wastegate. wastegate. Qualifying closed with the traditional 33 cars in the field .. traditional 33 cars. Indianapolis 500 traditions. However , the day before the race a special qualifying session was held to allow certain entries a last chance to qualify .. Two additional cars were added to the field , for a total of 35 cars -LRB- the most since 1933 -RRB- .. The high tensions and numerous technical squabbles during the month attracted considerable negative criticism from sports writers and media .. The race itself , however , was competitive and entertaining , and completed without major incident or controversy .. Among those in attendance was former president Gerald Ford .. president. List of Presidents of the United States. Gerald Ford. Gerald Ford. Ford also served as the grand marshal of the 500 Festival Parade .. grand marshal. grand marshal. 500 Festival Parade. 500 Festival Parade. The 1979 race is also notable in that it was the first to utilize the pace car during caution periods .. pace car. Safety car