As shown in Figure 5(c), the top 7 clusters of keywords were “growth,” “transcription factor,” “rig i,” “metastatic melanoma,” “trail,” “cyclooxygenase 2,” and “reduced glutathione.” We found that “tumor necrosis factor” and “trail induced apoptosis” were with the highest burst strength (Figure 5(d)). The gene discussed is PTGS2; the disease is metastatic melanoma.