Give you a statement and table with its title in Markdown format, please determine whether the statement is supported or refuted by, or is unrelated to the table. It'a binary classification problem, you should choose the answer between supported and refuted. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| name | circuit | date | winning driver | winning constructor | report |
| pau grand prix | pau | 10 april | rené dreyfus | delahaye | report |
| campbell trophy | brooklands | 18 april | prince bira | era | report |
| cork grand prix | carrigrohane | 23 april | rené dreyfus | delahaye | report |
| tripoli grand prix | mellaha | 15 may | hermann lang | mercedes - benz | report |
| gávea nacional circuit | gávea | 29 may | arthur nascimento jr | alfa romeo | report |
| grand prix des frontières | chimay | 5 june | maurice trintignant | bugatti | report |
| rio de janeiro grand prix | gávea | 12 june | carlo maria pintacuda | alfa romeo | report |
| coppa ciano | montenero | 7 august | hermann lang | mercedes - benz | report |
| coppa acerbo | pescara | 15 august | rudolf caracciola | mercedes - benz | report |
| junior car club 200 mile race | brooklands | 27 august | johnny wakefield | era | report |
| mountain championship | brooklands | 15 october | raymond mays | era | report |
| donington grand prix | donington park | 22 october | tazio nuvolari | auto union | report |
Title:
1938 grand prix season
Statement:
bugatti , auto union , and alfa romeo were the only constructors to win a single race
Answer:
supported