Question:
Which position did Stavros Kostopoulos hold in Aug, 1950?

Context:
 Stavros Kostopoulos holds the position of Minister for Foreign Affairs of Greece from Feb, 1964 to Jul, 1965. 
 Stavros Kostopoulos holds the position of Minister for National Defence of Greece from Aug, 1965 to Dec, 1966. 
 Stavros Kostopoulos holds the position of Minister of Commercial Marine of Greece from Apr, 1950 to Sep, 1950. 
 Stavros Kostopoulos holds the position of Minister of Supplies from May, 1948 to Nov, 1948. 
 Stavros Kostopoulos holds the position of Greek Minister of the Interior from Nov, 1963 to Dec, 1963. 
 Stavros Kostopoulos holds the position of Member of the Hellenic Parliament from Jan, 1928 to Jan, 1946. 
 Stavros Kostopoulos holds the position of Minister without portfolio of Greece from Aug, 1950 to Sep, 1950. 
 Stavros Kostopoulos holds the position of Minister of the National Economy of Greece from Jan, 1947 to Feb, 1947. 
 Stavros Kostopoulos holds the position of Minister of Coordination of Greece from Mar, 1950 to Apr, 1950. 
 Stavros Kostopoulos holds the position of Minister of Economy of Greece from Sep, 1950 to Mar, 1951.

Answer:
Minister of Commercial Marine of Greece