Question:
Who was the head of Romania in Aug, 1998?

Context:
 Radu Vasile is the head of the government of Romania from Apr, 1998 to Dec, 1999. 
 Gheorghe Tătărescu is the head of the government of Romania from Jan, 1934 to Dec, 1937. 
 Theodor Stolojan is the head of the government of Romania from Oct, 1991 to Nov, 1992. 
 Ștefan Golescu is the head of the government of Romania from Nov, 1867 to May, 1868. 
 Nicolae Golescu is the head of the government of Romania from May, 1868 to Nov, 1868. 
 Dimitrie Ghica is the head of the government of Romania from Nov, 1868 to Jan, 1870. 
 Theodor Rosetti is the head of the government of Romania from Mar, 1888 to Mar, 1889. 
 Barbu Catargiu is the head of the government of Romania from Feb, 1862 to Jun, 1862. 
 Armand Călinescu is the head of the government of Romania from Mar, 1939 to Sep, 1939. 
 Chivu Stoica is the head of the government of Romania from Oct, 1955 to Mar, 1961. 
 Călin Popescu-Tăriceanu is the head of the government of Romania from Dec, 2004 to Dec, 2008. 
 Nicolae Crețulescu is the head of the government of Romania from Jun, 1865 to Feb, 1866. 
 Manea Mănescu is the head of the government of Romania from Feb, 1974 to Mar, 1979. 
 Mugur Isărescu is the head of the government of Romania from Dec, 1999 to Dec, 2000. 
 Victor Ciorbea is the head of the government of Romania from Dec, 1996 to Apr, 1998. 
 Ion G. Duca is the head of the government of Romania from Nov, 1933 to Dec, 1933. 
 Alexandru G. Golescu is the head of the government of Romania from Feb, 1870 to Apr, 1870. 
 Ilie Verdeț is the head of the government of Romania from Mar, 1979 to May, 1982. 
 Petre Roman is the head of the government of Romania from Dec, 1989 to Oct, 1991. 
 Manolache Costache Epureanu is the head of the government of Romania from May, 1876 to Aug, 1876. 
 Victor Ponta is the head of the government of Romania from May, 2012 to Nov, 2015. 
 Mihai Tudose is the head of the government of Romania from Jun, 2017 to Jan, 2018. 
 Octavian Goga is the head of the government of Romania from Dec, 1937 to Feb, 1938. 
 Sorin Grindeanu is the head of the government of Romania from Jan, 2017 to Jun, 2017. 
 Dacian Cioloș is the head of the government of Romania from Nov, 2015 to Jan, 2017. 
 Dimitrie Sturdza is the head of the government of Romania from Apr, 1897 to Apr, 1899. 
 Dimitrie Brătianu is the head of the government of Romania from Apr, 1881 to Jun, 1881. 
 Constantin Dăscălescu is the head of the government of Romania from May, 1982 to Dec, 1989. 
 Constantin Bosianu is the head of the government of Romania from Jan, 1865 to Jun, 1865. 
 Petru Groza is the head of the government of Romania from Mar, 1945 to Jun, 1952. 
 Petre S. Aurelian is the head of the government of Romania from Dec, 1896 to Apr, 1897. 
 Constantin Sănătescu is the head of the government of Romania from Aug, 1944 to Dec, 1944. 
 Mihai Răzvan Ungureanu is the head of the government of Romania from Feb, 2012 to May, 2012. 
 Gheorghe Argeșanu is the head of the government of Romania from Sep, 1939 to Sep, 1939. 
 Nicolae Văcăroiu is the head of the government of Romania from Nov, 1992 to Dec, 1996. 
 Take Ionescu is the head of the government of Romania from Dec, 1921 to Jan, 1922. 
 Miron Cristea is the head of the government of Romania from Feb, 1938 to Mar, 1939. 
 Adrian Năstase is the head of the government of Romania from Dec, 2000 to Dec, 2004. 
 Florin Cîțu is the head of the government of Romania from Dec, 2020 to Nov, 2021. 
 Gheorghe Gheorghiu-Dej is the head of the government of Romania from Jun, 1952 to Oct, 1955. 
 Emil Boc is the head of the government of Romania from Dec, 2008 to Feb, 2012. 
 Mihail Kogălniceanu is the head of the government of Romania from Oct, 1863 to Jan, 1865. 
 Ludovic Orban is the head of the government of Romania from Nov, 2019 to Dec, 2020. 
 Ion Ghica is the head of the government of Romania from Dec, 1870 to Mar, 1871. 
 Nicolae Ciucă is the head of the government of Romania from Nov, 2021 to Dec, 2022. 
 Lascăr Catargi is the head of the government of Romania from Dec, 1891 to Oct, 1895. 
 Ion Gigurtu is the head of the government of Romania from Jul, 1940 to Sep, 1940. 
 Viorica Dăncilă is the head of the government of Romania from Jan, 2018 to Nov, 2019. 
 Ion Gheorghe Maurer is the head of the government of Romania from Mar, 1961 to Feb, 1974. 
 Nicolae Iorga is the head of the government of Romania from Apr, 1931 to Jun, 1932. 
 Nicolae Rădescu is the head of the government of Romania from Dec, 1944 to Feb, 1945. 
 Ion Emanuel Florescu is the head of the government of Romania from Mar, 1891 to Dec, 1891. 
 Ion C. Brătianu is the head of the government of Romania from Jun, 1881 to Mar, 1888. 
 Constantin Argetoianu is the head of the government of Romania from Sep, 1939 to Nov, 1939.

Answer:
Radu Vasile