Table schema:
CREATE TABLE table_name_94 (_ppp__ VARCHAR, d__billions_of_us$_ VARCHAR, expenditures_on_r INTEGER, country_region VARCHAR, year VARCHAR)

Question: What is the lowest expenditures on R&D for Poland after 2011?
SQL: SELECT MIN(expenditures_on_r) & d__billions_of_us$_, _ppp__ FROM table_name_94 WHERE country_region = "poland" AND year > 2011