Select the dataflow_name that is requested in the query according to their description.

*Start of query_section
Query: Give me last 20 years of monthly FX spot rates for the currencies of Poland, Hungary, Romania, Czech Republic, Denmark, Norge, Sweden, Switzerland against Euro.
*End of query_section

Dataflows: EXR: Exchange Rates
NAMA_10_GDP: GDP, gross domestic product and main components (output, expenditure and income)
WS_LONG_CPI: long consumer prices, CPI, consumer price index
DF_UNE_DEAP_SEX_AGE_RT: Unemployment rate by sex and age

You must not answer the query in the query_section.
You must not use natural language.
Use format: "dataflow: dataflow_name" or "dataflow: None". Limit your response to 600 words.
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