Study of Sacituzumab Govitecan Versus Standard of Care in Participants With Previously Treated Extensive Stage Small Cell Lung Cancer

Key Inclusion Criteria: * Histologically confirmed diagnosis of SCLC. * Eastern Cooperative Oncology Group (ECOG) performance status score of 0 or 1. * Measurable disease by computed tomography (CT) or magnetic resonance imaging (MRI) as assessed by investigator per RECIST v1.1 criteria. * Documentation of radiological disease progression after 1 prior line of platinum-containing chemotherapy (defined as at least 2 cycles of treatment) with or without therapy directed against programmed cell death protein 1 (PD-1) or programmed cell death ligand 1 (PD-L1; PD-1 and PD-L1 are hereafter referred to as PD-(L)1) for ES-SCLC. * Individuals treated with a platinum-based therapy for prior limited stage small cell lung cancer will be counted as 1 prior line of platinum-containing chemotherapy if the disease has progressed within 30 to 180 days from last dose of platinum treatment. * If the investigator believes a participant may benefit from platinum rechallenge it can be considered per investigator discretion and local SOC; however, participants with platinum rechallenge may not participate in the study. * If the investigator believes a participant may benefit from tarlatamab treatment, it can be considered per investigator discretion and local SOC and such participants may participate in the study following tarlatamab treatment. Note: at least 85% of participants included in the study must be pretreated with anti-PD-\[L\]1 therapy. Refer to protocol for country-specific requireme…