Understanding the mechanisms involved in life (e. g., discovering the biological functionofasetofproteins, inferringtheevolutionofasetofspecies)isbecoming increasinglydependent onprogressmade inmathematics, computer science, and molecular engineering. For the past 30 years, new high-throughput technologies have been developed generating large amounts of data, distributed across many data sources on the Web, with a high degree of semantic heterogeneity and di?erentlevelsofquality. However, onesuchdatasetisnot, byitself, su?cientfor scienti?c discovery. Instead, it must be combined with other...