Conversation so far:
where did the uk come in eurovision song contest
The United Kingdom came in 26th place in the Eurovision Song Contest 2019.
what song did the uk perform at the eurovision song contest 2019
The United Kingdom's selected song for the Eurovision Song Contest 2019 was Bigger than Us by Michael Rice.
how many times has the uk participated in the eurovision song contest
The United Kingdom has participated in the Eurovision Song Contest 62 times.
what other countries are part of the eurovision song contest big 5 besides the uk
The United Kingdom is one of the Eurovision Song Contest Big 5, along with France, Germany, Italy and Spain.

Question: why are the countries the big 5
Self-contained rewrite: why are the uk, france, germany, italy, and spain the big 5 in the eurovision song contest