I want to know the answer to the following question:
What did the Angiosperm Phylogeny group use determine a phylogeny of flowering plants?
All the background I'm provided with is that "Molecular analysis of DNA sequences from most families of flowering plants enabled the Angiosperm Phylogeny Group to publish in 1998 a phylogeny of flowering plants, answering many of the questions about relationships among angiosperm families and species.". Is that enough to answer the question?