Try out the RNAcentral search by completing the following example tasks and check the answers on the next page:
Find the RefSeq identifier of braveheart lncRNA.
Find the lncRNAs from the following paper:
A cytoplasmic NF-κB interacting long noncoding RNA blocks IκB phosphorylation and suppresses breast cancer metastasis
Liu et al., 2015. Cancer Cell. 2015 Mar 9;27(3):370-81
Search for your favorite ncRNA and see if it is in RNAcentral.