The webapp provides for each item the link on ECB's website.
Speeches for : Philip R. Lane where "convergence" appeared
2020-10-06 : The ECB’s monetary policy in the pandemic: meeting the challenge2020-08-27 : The pandemic emergency: the three challenges for the ECB
2020-02-27 : Monetary policy, low interest rates and low inflation
2019-09-16 : Reflections on monetary policy