Question: The 15th and 18th top scorers of all time in Liga I are from which country?

Context paragraphs:
List of Bradford City A.F.C. seasons: This is a list of Bradford City A.F.C. seasons in English and European football, from 1903—when the club were formed—to the 2014–15 season.  It details the club's achievements in senior league and cup competitions, European competitions and the top scorers for each season.  The list of top scorers also chronicles how the club's scoring records have progressed throughout the club's history.

Radek Bukač: Radek Bukač (born 12 June 1981) is a professional Czech football player who played Gambrinus liga football for FK Viktoria Žižkov.  He was among the top scorers in the 2005–06 Czech 2.  Liga.

2011–12 Primeira Liga: The 2011–12 Primeira Liga (also known as Liga ZON Sagres for sponsorship reasons) was the 78th season of the Primeira Liga, the top professional league for Portuguese association football clubs.  It began on 14 August 2011 and ended on 13 May 2012.  A total of 16 teams contested the league, 14 of which already took part in the previous season and two of which were promoted from the Liga de Honra.  Porto were the defending champions and secured their 26th and second consecutive league title.  Óscar Cardozo and Lima, respectively Benfica's and Braga's strikers, were the joint top scorers with 20 goals.

1985–86 Liga Leumit: The 1985–86 Liga Leumit season saw Hapoel Tel Aviv win the title.  Hapoel Haifa, Hapoel Jerusalem and Maccabi Sha'arayim were all relegated to Liga Artzit.  Uri Malmilian of Beitar Jerusalem and Doron Rabinzon of Maccabi Petah Tikva were the league's joint top scorers with 14 goals.

1978–79 Liga Leumit: The 1978–79 Liga Leumit season saw Maccabi Tel Aviv win the title, whilst Hapoel Hadera, Hapoel Jerusalem and Hapoel Rishon LeZion (in their first season back in the top division since 1952) were relegated to Liga Artzit.  Oded Machnes (Maccabi Netanya) and Eli Miali (Beitar Jerusalem) were the league's joint top scorers with 18 goals.

Mircea Dridea: Mircea Dridea (born 7 April 1937) is a Romanian former professional footballer who plays as a forward.  He played 19 years at Petrolul Ploiești, the only club whose shirt he dressed as a footballer from 1952 to 1971, including the youth period.  Mircea Dridea occupies the 15th place in the Liga I all-time top scorers with 142 goals: over Gheorghe Hagi (141), Nicolae Dobrin (111) or Marius Lăcătuș (103).  He played with Petrolul in European Cup and UEFA Cup Winners' Cup against teams like: Wismut Karl Marx Stadt, Wiener Sport-Club, Liverpool and Fenerbahçe.

Marius Lăcătuș: Marius Mihai Lăcătuș (] ; born 5 April 1964 in Brașov) is a retired Romanian football player and football coach.  He is so far the most successful football player ever to play for Steaua București.  He is all-time top scorer for Steaua with 16 goals in European competitions.

2011–12 Esteghlal F.C. season: The 2011–12 season are the Esteghlal Football Club's 11th season in the Iran Pro League, and their 18th consecutive season in the top division of Iranian football.  They are also competing in the Hazfi Cup and AFC Champions League, and 67th year in existence as a football club.  Mojtaba Jabbari and Arash Borhani both with 13 goals are the top scorers of Esteghlal.

2003 Rugby World Cup try scorers: This article lists each country's try scorers in the 2003 Rugby World Cup.  The top scorers were Doug Howlett and Mils Muliaina of New Zealand with 7 tries each.

List of Chelsea F.C. seasons: This is a list of all seasons played by Chelsea Football Club in English and European football, from their inaugural season in 1905–06 to their last completed season (2014-15).  It details their record in every major competition entered, as well as the top goalscorers for each season.  Top scorers in bold were also the top scorers in the English league that season.

Supporting paragraphs: Mircea Dridea Marius Lăcătuș
Answer: Romania